what is an human development essay

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What is Human Development?

While the expression “human development” is widely used, it is understood in different ways around..

HDRO Outreach

2015 marks 25 years since the first Human Development Report introduced a new approach for advancing human flourishing. And while the expression “human development” is widely used, it is understood in different ways around the world. So on the occasion of the 25th anniversary year of human development reporting, we’d like to highlight how the Human Development Report Office (HDRO) presents human development.

Credit: UNDP Kosovo’s animation "What is Human Development?" explains and promotes sustainable human development.

Human development grew out of global discussions on the links between economic growth and development during the second half of the 20th Century. By the early 1960s there were increasingly loud calls to “dethrone” GDP: economic growth had emerged as both a leading objective, and indicator, of national progress in many countries i , even though GDP was never intended to be used as a measure of wellbeing ii . In the 1970s and 80s development debate considered using alternative focuses to go beyond GDP, including putting greater emphasis on employment, followed by redistribution with growth, and then whether people had their basic needs met.

These ideas helped pave the way for the human development approach, which is about expanding the richness of human life, rather than simply the richness of the economy in which human beings live. It is an approach that is focused on creating fair opportunities and choices for all people. So how do these ideas come together in the human development approach?

• People: the human development approach focuses on improving the lives people lead rather than assuming that economic growth will lead, automatically, to greater opportunities for all. Income growth is an important means to development, rather than an end in itself.

• Choices: human development is, fundamentally, about more choice. It is about providing people with opportunities, not insisting that they make use of them. No one can guarantee human happiness, and the choices people make are their own concern. The process of development – human development - should at least create an environment for people, individually and collectively, to develop to their full potential and to have a reasonable chance of leading productive and creative lives that they value.

The human development approach, developed by the economist Mahbub Ul Haq, is anchored in Amartya Sen’s work on human capabilities, often framed in terms of whether people are able to “be” and “do” desirable things in life iii . Examples include

Beings: well fed, sheltered, healthy

Doings: work, education, voting, participating in community life.

Freedom of choice is central: someone choosing to be hungry (during a religious fast say) is quite different to someone who is hungry because they cannot afford to buy food.

As the international community seeks to define a new development agenda post-2015, the human development approach remains useful to articulating the objectives of development and improving people’s well-being by ensuring an equitable, sustainable and stable planet.

i Kennedy, Robert. (1968). Address to the University of Kansas, Lawrence, Kansas on March 18, 1968. www.informationclearinghouse.info/article27718.htm ii Simon Kuznets, who created GDP, warned expressly against using it as a measure of wellbeing. Kuznets, Simon. “National Income, 1929–1932.” U.S. Congress, Senate Doc. No. 124–73, at 7 (1934) iii Professor Sen was awarded the Nobel Memorial Prize in Economic Sciences in 1998 for his work in welfare economics.

Photo credit: UNDP Mongolia's #GivingTuesday

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Human Development Essay: Topics, Examples, & How-to Guide

A human development essay is a piece of writing that explores how a person or group of people can grow and thrive. Several disciplines study these processes and might require you to get ready with this kind of assignment:

• Biology analyzes human body development issues throughout our lifespan;
• Psychology views human development as gaining or abandoning certain behavioral trends;
• Sociology explains the cause-and-effect relationships between an individual and a group;
• Economics studies the growth of human freedoms through the improvement of their well-being.

This article systematizes the available bulk of knowledge on the importance of human development. We have collected the essential concepts and approaches you can explore through our human development essay topics and samples.

💵 Human Development in Economics

🤯 human development in psychology.

• 🧒 Human Growth Essay Topics
• 📑 Outlining Your Essay
• 1️⃣ HD Theories: Essay Example
• 2️⃣ HD & Economic Growth: Essay Example

The first Human Development Report introduced this notion back in 1990 . But the discussion of the relationship between economic growth and human development started in the middle of the 20 th century.

Now we believe that GDP is not the only indicator of our well-being . Human life is more than just selling, buying, and consuming.

Human development in economics focuses on the creation of equal rights and opportunities for everyone . This approach states that the entire society would prosper from the happiness of each of its members.

In these terms, human development has two dimensions:

• enhancement of human abilities;
• provision of prerequisites for our growth.

The former explores how we could ensure that everyone has access to education , healthcare, and decent living conditions. The latter involves achieving environmental sustainability and equality of rights and opportunities for people of all genders, ages, and ethnic backgrounds.

Human Development Index

The Human Development Index (HDI) emphasizes that people and their well-being are the criteria for a country’s prosperity, not only its economic growth.

Today, we use HDI to question the efficiency of national policy. It also allows us to compare different countries with the same GDP but different human development levels. Analyzing this data, governments can refocus their priorities and correct past mistakes.

HDI is calculated as the geometric mean of the following normalized indices:

• Life expectancy at birth is used to calculate the life expectancy index, where 85 years is the maximum.
• The education index is the sum of the expected and mean years of schooling divided by 2.
• This index is determined as GNI per capita.

Meanwhile, HDI is not as comprehensive as one might expect. HDRO (the Human Development Report Office) claims that it does not consider human inequalities, the empowerment of minorities, poverty levels, and gender disparity .

Psychology views human development from an individual’s perspective. This discipline distinguishes between three directions of human development.

• Physical changes occur in our bodies. How do we grow from a baby into an adult and from an adult into an older person? How do we acquire new motor skills, and what is the biology of our senses? What do our brains consist of , and how do they change with age? Correct answers to these questions help us explain the next direction.
• Cognitive changes cause the development of human behavior. What goes on in our brain that defines what kind of people we are? This domain focuses on logical thinking, learning, understanding, moral reasoning , and practical intelligence. It searches for the ways we could learn faster and become better versions of ourselves.
• Psychosocial changes track the growth of our social skills and preferences. It all starts with the principal caregiver. Gradually, we begin to interact with more people, such as friends, distant relatives, educators, and colleagues. It is all about our self-image, self-esteem , emotions, and relationships. The psychosocial domain also studies our ways to cope with losses or death.

Human Development Theories

The history of psychology knows many human development theories, many of which are still trusted. We will focus on the two fundamental approaches. They divide childhood into several critical stages that define our character, habits, likes, relationships, and even success in life.

Piaget’s 4 Stages of Cognitive Development

Piaget’s theory is the most widely accepted approach to child development. He believed that children construct knowledge while they manipulate and explore the objects around them. Jean Piaget marked four stages of cognitive development .

• Sensorimotor stage (0-2 years). A child learns that objects do not disappear. Their activity is all about experimenting with things to see what happens. This stage should culminate with developing the deferred imitation skill. It involves the ability to reproduce an action or sound made by another person later.
• Preoperational stage (2-6 years). Children use symbols to represent words and ideas. They develop the language and make-believe play but still lack logical reasoning . They are egocentric and cannot imagine that other people may feel or think differently.
• Concrete operational stage (6-12 years). Thinking becomes logical and focused. Children develop inductive reasoning: they observe to make generalizations about the world around them. But they still struggle with deductive thinking.
• Formal operational stage (12 years – adulthood). Abstract thinking emerges. They learn to develop theoretical ideas to explain the world.

Freud’s 5 Stages of Psychosexual Development

The Father of Psychoanalysis believed that human personality consisted of ego, superego, and id. They become unified and inseparable once the child passes the five stages of psychosexual development.

• Oral stage (0-1 year). The mouth is the pleasure center for the infant. That is why everyone is born with a sucking reflex. If the oral needs are not met during the first year of life, the child can start biting their nails or suck a thumb.
• Anal stage (1-3 years). Children gain control over their bodily functions. They experiment with feces. But early toilet training can make a child too obsessed with order.
• Phallic stage (3-6 years). Children find out the pleasure they can get from their genitals. According to Freud, this is when the sexual desire to the parent of the opposite sex emerges. Boys go through the Oedipus complex. They want to replace their father and see him as a rival in the mother’s love. Later, Carl Jung spoke of the Electra Complex, a similar mechanism in girls.
• Latency stage (6-12 years). Sexual instincts give way to the superego. During this period, children adopt the moral principles and values of their parents.
• Genital stage (12+ years). Sexual instincts reemerge. If all the above steps passed successfully, adolescents would show appropriate sexual behavior.

But this theory is too controversial to be taken for granted. Do parents define their child’s sexual and aggressive drives? Nobody knows for sure.

💡 232 Human Development Essay Topics

Since human development is a debatable and scarcely studied area of knowledge, it offers a whole lot of topics to discuss. For your convenience, we have divided them into two categories:

• The first can be used for essays on human development psychology.
• The second includes human growth and development essay topics in economics and sociology.

155 Human Development Topics (Psychology)

Psychology focuses on the emotional, intellectual, and social development of an individual. Scientists traditionally divide this growth into stages, according to the respective age. That is why the topics here can be about early childhood, parent-child relationships, school years, adolescence, marriage, and divorce .

• Child psychology: Theories of development by J. Piaget .
• How can parents facilitate their child’s relationships with peers?
• Divorce: Psychological effects on children .
• Which purposes does attachment play in infants?
• Bronfenbrenner’s ecological theory of development.
• Which ideas of Freud’s psychosexual development theory do you think are valid?
• Find the common features between Freud’s psychosexual theory and Erikson’s psychosocial theory.
• Child development and education.
• Explore the causes of inferiority complex in adolescents.
• Children’s play: An ingredient needed in children’s learning .
• How does one’s sense of self influence their future relationships?
• Corporal punishment and its effects on children.
• Why do we need to reward the feeling of gratitude in adolescents?
• What is the role of the family in shaping our social well-being?
• Developmental psychology in adolescence.
• Describe the principles of caregiving you consider as healthy and beneficial.
• Personal development plan .
• What is social knowledge, and where do we gain it?
• Write a human development theories essay.
• Emotional development in children and adults.
• What do the preferred leisure activities of adolescents tell us about their development?
• Early childhood classroom environment plan .
• Does the gender of the main caregiver matter?
• Study the effect of orphanage education on a child’s psychology.
• The introduction to early childhood education.
• Is a child’s family or school more defining for their development?
• Second life : Professional development and communication .
• How does patriarchal prejudice undermine the intellectual growth in girls?
• Does the lack of college-level education make a person less smart?
• Sigmund Freud’s personality and psychoanalysis.
• How did dr. Maria Montessori use human tendencies for child development?
• Adult learning theories .
• How does a father’s toxic masculinity impact a boy’s emotional well-being?
• Early childhood cognitive-based philosophy .
• Make a research summary of the role of IQ in human development.
• Explore the causes of the “terrible threes.”
• Lifespan human development: perspective and theories.
• Write a reflection about risk-taking behaviors in teenagers.
• Linking human development to the human condition .
• Is poverty the worst factor for a child’s development?
• Early childhood education activities and trends .
• Analyze the consequences of substance abuse in adolescence.
• Cognitive behavioural therapy for depression in adults .
• Do children adopt their same-sex parent’s gender roles in adulthood?
• Child abuse and neglect effects on adult survivors .
• What is the role of creativity in a preschooler’s development?
• Tools of the mind in the early childhood development.
• Do you agree that all psychological disorders of children under 12 are caused by an unhealthy family atmosphere?
• The theories of child development .
• How do we learn to control our emotions?
• How autistic children develop and learn?
• Analyze the major results of gender-neutral education.
• Early childhood education and skills development .
• When is the due time to start sex education of children and why?
• Erik Erikson’s theory of development .
• What is the tole of symbolic function and make-believe play in a child’s development?
• Family structure and its effects on children .
• Why is egocentrism in children normal?
• Infant development.
• Establish the relationship between language development and intellectual growth.
• Biological, cognitive, and socioemotional development .
• Sexism in human development theories.
• How an operant conditioning influences child development .
• Awareness of age-related change helps to live a healthy life.
• Middle childhood and adolescence development.
• The adverse effect of malnutrition in a child’s development.
• Assessment in early childhood: Special education .
• When is stress positive and negative for the psychological development of an individual?
• How video games affect children .
• Analyze human development in multigenerational families.
• Erickson’s psychosocial development and its stages.
• Compare and contrast the American and Japanese approaches to education and their results.
• Theoretical perspectives on human development: Freud, Piaget, and Skinner .
• The role of controlled independence in childhood.
• Technology impacts on the new generation of children .
• Why is periodical boredom necessary for a child to develop?
• Learning and student development theories and factors .
• Why is human development the basic need of any society?
• The development of secure and insecure attachments in children .
• Why is intellectual growth so pleasurable for us?
• Moral and personality development.
• If the human development mechanism is equal for all, why are we so different?
• 21 st century skills development .
• Why do modern sociologists think we should work less?
• Peer pressure on children in high school .
• What could we learn from the indigenous African tribes in terms of the psychological development of children?
• Interaction for child’s development and learning.
• Schools: an unknown war where we miss our childhood?
• Effects of media on children .
• To which degree do genes determine our development?
• Jean Piaget – cognitive theorist.
• Why are foster children less prepared for adult life than their adopted peers?
• When should children start school ?
• When do children stop learning through play?
• Managing stress better: Personal development .
• Which socio-emotional factors make aging less depressing?
• Preschool play role in the cognitive development.
• The benefits and drawbacks of grandparents’ raising children.
• Autism as the most prevalent developmental mental disorder .
• How does lifelong learning benefit human brain?
• Teaching and supporting adult learners .
• How does lifestyle influence our cognition?
• Parent-child relationships and parental authority .
• Should adults develop an awareness of their aging?
• Early intervention for young children with autism.
• Why do scientists no longer view aging as a negative process?
• Development and improvement of communication skills .
• Which factors define our ability for emotional regulation?
• Child’s play observation and parent interview .
• Compare the Christian and Muslim cultural differences in human development.
• The early abuse’ impacts on teenagers emotional development .
• Are private nurseries and schools better for children’s development?
• Behavior change in learning processes.
• Why is generation alpha more emotionally intelligent than any earlier-born children?
• Videogame addiction and its impact on children .
• Shout less and explain more: the effect of the modern approach to caregiving.
• Adult education, its objectives and approaches .
• Why should we tell our daughters they are smart rather than beautiful?
• Personal development: Career management .
• How does social change impact the life of an individual? Give examples.
• Piaget’s and Vygotsky’s child development theories.
• Suggest mentoring interventions for at-risk adolescents.
• Adult learning and effective instruction .
• To which extent should we normalize children with developmental disorders?
• Negative impacts of adult cartoon television programs on children .
• Do developmental differences make us more human?
• Social psychology in people’s life.
• Do all families need psychotherapy, like they need a family doctor?
• Childhood sexual abuse and adolescents’ self-esteem .
• Which barriers do LGBT adolescents meet in their development?
• Life-span development and personal life experiences .
• Outline a positive youth development program.
• Understanding learning: theories’ impacts.
• Explain eating disorders as the result of incorrect upbringing.
• The influence of online games on children and adults .
• Describe the changes our brain suffers under continuous stress.
• The psychological effect of 9-11 on young adults .
• Typical vs. Atypical development in children.
• Social psychology: group influence on the self.
• Why is mindfulness important for human development?
• Importance of a teacher in child development .
• We learn behavioral health from our parents.
• Divorce influence on childrens’ mental health.
• How do behavioral phenotypes emerge during early development?
• Child development theories: Comparative analysis .
• Why do many children function differently in home, school, or community settings?
• Communication role in the children’ development .
• Suggest ways to identify co-occurring conditions in developmental disorders.
• Psychological child development theories.
• Describe the existing approaches to establishing healthy schools.
• Piaget’s stages of cognitive development .
• Parental autonomy vs. Monitoring: which is better for an adolescent?
• Postpartum depression effect on children’s development .
• How do parents’ beliefs and values determine their parenting strategies?
• Childhood and optimal development analysis .

77 Human Development Topics (Economics)

• How entrepreneurship in the energy sector can pave the way for sustainable development in Africa .
• What are the parties involved in human development, and why don’t they share the same interests?
• Should we care about income inequality ?
• Why does totalitarianism entail stagnation?
• Democratic and Economic Development in Asian Countries.
• Do migrant incomes spur economic development in their native countries?
• International human resource development .
• How does the growth of female entrepreneurship favor economics?
• A development of American society .
• How can equal rights and possibilities of all people make governments more efficient?
• Resolving the problems of poverty and income inequality .
• How does the availability of loans benefit human development?
• Development Theory and Human Rights.
• Should towns transform into cities to become more prosperous?
• Resource availability for low to moderate income families in New York City .
• Is feminism a sign of human evolution?
• Rapid urbanization in the developing world is increasing .
• What is the impact of literacy campaigns in socially disadvantaged rural areas?
• Poverty reduction in developing countries .
• Find the relationship between water resources and the level of farming development in a given region.
• Human Rights for Development.
• Explore the growing urban-rural interactions in large cities.
• Employment opportunity for people with learning disabilities in the UK .
• Give examples of win-win scenarios in human evolution.
• Analysing a community development: Case study .
• Why do societies often ignore or resist the advantages of human development?
• How innovation and growth strategy will develop Abu Dhabi economy through Abu Dhabi Economic Vision 2030 .
• Study the role of recreational possibilities for the local population.
• Values of innovation and entrepreneurship in economic development .
• The effect of food availability on human development.
• Millennium Development and Well-Being of Families.
• Do you support transnational social movements, and why?
• Compensation and benefits in an area of human resources development .
• Do religions favor economic development?
• Influence of religion on the development of colonial American society .
• Analyze the impact of socioeconomic context on human development.
• Is nationalism beneficial for a country’s well-being?
• The development of the industrial work environment .
• Which factors impede poor people from growing their capital?
• Crime prevention through social development .
• Is leisure more critical for economic growth than production?
• Alternative Fuels and the US Nation Development.
• Should the government regulate human development, or is it unpredictable?
• Development traps and failure: The negative consequences of disasters on the economy .
• What are the external factors of human development in emerging countries?
• Fiscal decentralisation and local economic development in Ghana .
• Human Development Index (HDI) Vs. Gross Domestic Product (GDP).
• National human resource development in Asian states .
• Which aspects would you include in the HDI formula?
• Is late retirement beneficial for a country’s economic development?
• Environment: Sustainable Development in Abu Dhabi.
• Which material conditions affect human evolution?
• The critical points of equal employment opportunity .
• The role of sustainable development in a country’s well-being.
• Globalization drives inequality: Liberalist and structuralist perspectives .
• What is the primary goal of human development for economics?
• The income gap in the US economy .
• Are elevated birth rates a positive or negative factor for economic growth?
• Human resources development in the UK and Australia .
• What is the relationship between foreign capital penetration and human life expectancy in third-world countries?
• Economic and Social Development of the UAE.
• How does ethnic homogeneity influence human development in a given area?
• Gender wage gap and inequality .
• Why is the majority of wealthy countries democratic?
• Human resource development practices to achieve economic growth: The case of Singapore .
• Analyze the role of free medicine in social well-being.
• How can the employment of the disabled favor a country’s economy?
• Assessing why Nigeria LNG has been restricted in development .
• How is the work/family balance of employees important for a company’s prosperity?
• Workforce development and modern trends .
• Explore the effect of an individual’s well-being on a country’s development.
• Small business and development in South Africa .
• How does democratization improve a country’s productivity?
• Regional inequality of Yogyakarta .
• How does English training in third-world countries influence their development?
• Post-disaster development of Haiti .
• New conceptions of adulthood among the youth in the developing countries.

🧒 Human Growth and Development Essay Topics

• The impact of aging on human development.
• How do role models promote moral and behavioral development in the 21st century?
• Socioeconomic factors and their value in growth and development.
• The development of moral predispositions at an early age.
• The value of professional development of a person.
• Genetic regulation of growth in height and weight in teenagers.
• The role of initiative and guilt in the preschool age group.
• What are the main red flags in growth and development?
• Child health and human development over the lifespan.
• Emotional development of a person from birth to old age.
• Regulation of early human growth: the main peculiarities.
• COVID-19 and its role in children’s social development.
• How does environmental pollution affect human growth and development?
• The language development in humans and its key stages.
• How does maternal physical activity influence fetal growth?

Haven’t found the perfect topic in the lists above? Use our essay topic generator !

📑 Human Development Essay Outline

1. Introduction. By the end of your essay, your readers will surely forget what you wrote here. But do not underestimate the effect of a well-composed introduction on your audience’s expectations! Do your best to sound inspiring and upbeat in your human development essay introduction. Tell yourself, why did you select this topic? If it is an exciting issue for you, the readers will also get interested. So, the introduction speaks about the topicality and urgency of a problem. The thesis statement culminates your introduction. You should explain your position in a single sentence. Here are some good and bad examples:

Need to formulate a thesis statement? Use our thesis-making tool !

2. Main body. The primary rule here is structure. It is hard to read one long paragraph with many ideas. Introduce each argument from the new line. Give a topic sentence at the beginning of each section and then elaborate on it with examples and reflections.

3. Conclusion. In the field of human development, the conclusion of an essay should provide the prospects of the tendency you analyzed. Imagine yourself an analyst consulting an international company. What will happen if they continue doing the same? How can they reach different results? Once again, try to sound inspiring.

1️⃣ Human Development Essay Example #1 (Psychology)

Below you will find a sample of human development essays for a psychology-related discipline. It illustrates the outline we have mentioned above based on the topic Why Is Freud’s Developmental Theory considered outdated?

Human Development Theories Essay

1. Introduction. In the XXI century, we are all obsessed with development. We would like to become a better version of ourselves, develop our country, and humanity as a whole. Unfortunately, there is no axiom confirming the mechanism of human development.

Thesis statement. This essay explores the pitfalls of Freud’s developmental theory and questions its applicability.

2. Main Body.

Argument 1. Freud drew his theory from memories of his patients. But certain experiences people believe are true often turn out to be inaccurate. Sometimes, we fabricate our memories due to how we felt back then or would like to feel now. Thus, Freud used unreliable sources of information about child development.

Argument 2. Freud’s theory revolves around sexuality . But as Jung and Adler noticed, human life is more complicated than that. Oversimplification reduces us to instincts, which is not true. People have their subconscious fears and desires, but sexual energy is only one of their aspects.

Argument 3. Sigmund Freud only worked with adults. All adults are former children, but the researcher never studied children in their games, education, or frustrations. Freud had six kids, but his career never allowed him to spend much time with family. It is questionable how someone could draw conclusions about a child’s mental processes without actually speaking to a child.

3. Conclusion. Sigmund Freud largely contributed to modern psychology. He was the first to question our rational thinking and intellectual sobriety. But his five stages of psychosexual development are far from reality. First, they are constructed based on inaccurate and unreliable reports of mentally disturbed people. Second, sexuality is only one of the many things that make us who we are. Third, the scientist never did live research on children. That is why his theory is outdated now.

2️⃣ Human Development Essay Example #2 (Economics)

If you need to write an essay on human development while studying economics, you may use the following sample. It illustrates how to write an essay on the relationship between human development and economic growth.

Human Development and Economic Growth

1. Introduction. What happened first, human development or economic growth ? The early signs of economic growth appeared when the first people started exchanging their goods with the neighboring tribes. They had to develop a new skill and change their picture of the world to catalyze economic growth.

Thesis statement. This essay aims to confirm the two-way linkage between the development of individuals and economic growth.

Argument 1. If that first exchange of crops and cattle did not work out, we would have never got as developed as we are now. The economic growth that happened once we had mastered “business negotiations” gave us the necessary resources to develop other skills.

Argument 2. Human development is hardly predictable. The most significant improvements in technology, medicine, construction, and science happened during the most challenging times for humanity. The two world wars showed that we could develop when the economy is in decay. But the new production methods and scientific achievements give us an opportunity to grow the economy when things get better.

Argument 3. Economic growth without human development is limited. For example, when a third-world country receives an external capital inflow, its economy stabilizes or even grows. But if its population does not acquire new models of doing business, the money will end. Such a country will return to its previous poor condition.

3. Conclusion. It would be wrong to say that human development caused economic growth or vice versa. None of the two are possible without the other. Human development happened first, but further knowledge acquisition required economic growth. Improvement of the economy does not guarantee human intellectual growth. Meanwhile, it is an indispensable prerequisite for our development.

❓ Human Development Questions & Answers

What does the science of human development seek to understand.

This science tries to find the reasons why people tend to change over time or why they remain at the same level. It establishes the mechanisms through which we become more educated, moral, organized, and civilized. The science also describes the benefits and drawbacks of human development for the economy, sociology, psychology, and ecology.

What is Human Development and Family Studies?

Human Development and Family Studies focuses on the health and psychology of individuals throughout their lifespan. This area of knowledge discusses human life in the context of their family relationships and social roles. It is an interdisciplinary science that involves psychology, economy, and sociology.

How does culture affect human development?

Culture defines the way we perceive society and the world as a whole. It affects our vision of reality from early childhood. Culture influences our beliefs, values, and purposes. Moreover, it is a decisive factor for our self-image as an individual and a member of society.

What makes the study of human development a science?

The study of human development explores how we learn, mature, and adapt to changes and adverse conditions. It is largely related to psychology but also involves sociology, economics, anthropology, and biology. It is a science because it aims to describe, predict, and understand the changes in human behavior that bring us to development.

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Module 1: Lifespan Development

Defining human development, learning outcomes.

• Describe human development and its three domains: physical, cognitive, and psychosocial development
• Explain key human development issues about the nature of change: continuous/discontinuous, one course/multiple courses, and nature/nurture

Domains in Human Development

Figure 1 . Human development encompasses the physical, cognitive, and psychosocial changes that occur throughout a lifetime.

Physical Domain

Many of us are familiar with the height and weight charts that pediatricians consult to estimate if babies, children, and teens are growing within normative ranges of physical development. We may also be aware of changes in children’s fine and gross motor skills, as well as their increasing coordination, particularly in terms of playing sports. But we may not realize that physical development also involves brain development, which not only enables childhood motor coordination but also greater coordination between emotions and planning in adulthood, as our brains are not done developing in infancy or childhood. Physical development also includes puberty, sexual health, fertility, menopause, changes in our senses, and primary versus secondary aging. Healthy habits with nutrition and exercise are also important at every age and stage across the lifespan.

Cognitive Domain

If we watch and listen to infants and toddlers, we can’t help but wonder how they learn so much so fast, particularly when it comes to language development. Then as we compare young children to those in middle childhood, there appear to be huge differences in their ability to think logically about the concrete world around them. Cognitive development includes mental processes, thinking, learning, and understanding, and it doesn’t stop in childhood. Adolescents develop the ability to think logically about the abstract world (and may like to debate matters with adults as they exercise their new cognitive skills!). Moral reasoning develops further, as does practical intelligence—wisdom may develop with experience over time. Memory abilities and different forms of intelligence tend to change with age. Brain development and the brain’s ability to change and compensate for losses is significant to cognitive functions across the lifespan, too.

Psychosocial Domain

Development in this domain involves what’s going on both psychologically and socially. Early on, the focus is on infants and caregivers, as temperament and attachment are significant. As the social world expands and the child grows psychologically, different types of play and interactions with other children and teachers become important. Psychosocial development involves emotions, personality, self-esteem, and relationships. Peers become more important for adolescents, who are exploring new roles and forming their own identities. Dating, romance, cohabitation, marriage, having children, and finding work or a career are all parts of the transition into adulthood. Psychosocial development continues across adulthood with similar (and some different) developmental issues of family, friends, parenting, romance, divorce, remarriage, blended families, caregiving for elders, becoming grandparents and great grandparents, retirement, new careers, coping with losses, and death and dying.

As you may have already noticed, physical, cognitive, and psychosocial development are often interrelated, as with the example of brain development. We will be examining human development in these three domains in detail throughout the modules in this course, as we learn about infancy/toddlerhood, early childhood, middle childhood, adolescence, young adulthood, middle adulthood, and late adulthood development, as well as death and dying.

Who Studies Human Development and Why?

Many academic disciplines contribute to the study of development and this type of course is offered in some schools as psychology (particularly as developmental psychology); in other schools, it is taught under sociology, human development, or family studies. This multidisciplinary course is made up of contributions from researchers in the areas of health care, anthropology, nutrition, child development, biology, gerontology, psychology, and sociology, among others. Consequently, the stories provided are rich and well-rounded and the theories and findings can be part of a collaborative effort to understand human lives.

The main goals of those involved in studying human development are to describe and explain changes. Throughout this course, we will describe observations during development, then examine how theories provide explanations for why these changes occur. For example, you may observe two-year-old children to be particularly temperamental, and researchers offer theories to explain why that is. We’ll learn a lot more about theories, especially developmental theories, in the next module.

Key Issues in Human Development

• Is the change smooth or uneven (continuous versus discontinuous)?
• Is this pattern of change the same for everyone, or are there different patterns of change (one course of development versus many courses)?
• How do genetics and environment interact to influence development (nature versus nurture)?

Is Development Continuous or Discontinuous?

Continuous development views development as a cumulative process, gradually improving on existing skills (Figure 2). With this type of development, there is a gradual change. Consider, for example, a child’s physical growth: adding inches to their height year by year. In contrast, theorists who view development as discontinuous believe that development takes place in unique stages and that it occurs at specific times or ages. With this type of development, the change is more sudden, such as an infant’s ability to demonstrate awareness of object permanence (which is a cognitive skill that develops toward the end of infancy, according to Piaget’s cognitive theory—more on that theory in the next module).

Figure 2 . The concept of continuous development can be visualized as a smooth slope of progression, whereas discontinuous development sees growth in more discrete stages.

Is There One Course of Development or Many?

Is development essentially the same, or universal, for all children (i.e., there is one course of development) or does development follow a different course for each child, depending on the child’s specific genetics and environment (i.e., there are many courses of development)? Do people across the world share more similarities or more differences in their development? How much do culture and genetics influence a child’s behavior?

Stage theories hold that the sequence of development is universal. For example, in cross-cultural studies of language development, children from around the world reach language milestones in a similar sequence (Gleitman & Newport, 1995). Infants in all cultures coo before they babble. They begin babbling at about the same age and utter their first word around 12 months old. Yet we live in diverse contexts that have a unique effect on each of us. For example, researchers once believed that motor development followed one course for all children regardless of culture. However, childcare practices vary by culture, and different practices have been found to accelerate or inhibit the achievement of developmental milestones such as sitting, crawling, and walking (Karasik, Adolph, Tamis-LeMonda, & Bornstein, 2010).

For instance, let’s look at the Aché society in Paraguay. They spend a significant amount of time foraging in forests. While foraging, Aché mothers carry their young children, rarely putting them down in order to protect them from getting hurt in the forest. Consequently, their children walk much later: They walk around 23–25 months old, in comparison to infants in Western cultures who begin to walk around 12 months old. However, as Aché children become older, they are allowed more freedom to move about, and by about age 9, their motor skills surpass those of U.S. children of the same age: Aché children are able to climb trees up to 25 feet tall and use machetes to chop their way through the forest (Kaplan & Dove, 1987). As you can see, our development is influenced by multiple contexts, so the timing of basic motor functions may vary across cultures. However, the functions are present in all societies.

Figure 3. All children across the world love to play. Whether in (a) Florida or (b) South Africa, children enjoy exploring sand, sunshine, and the sea. (credit a: modification of work by “Visit St. Pete/Clearwater”/Flickr; credit b: modification of work by “stringer_bel”/Flickr)

How Do Nature and Nurture Influence Development?

Are we who we are because of nature (biology and genetics), or are we who we are because of nurture (our environment and culture)? This longstanding question is known in psychology as the nature versus nurture debate. It seeks to understand how our personalities and traits are the product of our genetic makeup and biological factors, and how they are shaped by our environment, including our parents, peers, and culture. For instance, why do biological children sometimes act like their parents—is it because of genetics or because of early childhood environment and what the child has learned from their parents? What about children who are adopted—are they more like their biological families or more like their adoptive families? And how can siblings from the same family be so different?

We are all born with specific genetic traits inherited from our parents, such as eye color, height, and certain personality traits. Beyond our basic genotype, however, there is a deep interaction between our genes and our environment. Our unique experiences in our environment influence whether and how particular traits are expressed, and at the same time, our genes influence how we interact with our environment (Diamond, 2009; Lobo, 2008). There is a reciprocal interaction between nature and nurture as they both shape who we become, but the debate continues as to the relative contributions of each.

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Home / Online Bachelor’s Degree Programs / Online Bachelor’s in Human Development and Family Studies / Bachelor’s in Human Development and Family Studies Resources / Stages of Human Development: What It Is & Why It’s Important

What Is Human Development and Why Is It Important? What Is Human Development and Why Is It Important? What Is Human Development and Why Is It Important?

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Tables of Contents

• Eight Stages of Human Development?
• Theories of Human Development

Human Development vs. Developmental Psychology

What are the genetic factors that affect human growth and development, why do we study human growth and development.

Imagine two children born in the same town and the same year to families with similar socioeconomic statuses. One child grows up to be assertive and confident, while the other grows up to be timid and shy. The study of the stages of human development can help explain the reasons for these differences and much more.

What is human development, exactly? Human development is a branch of psychology with the goal of understanding people — how they develop, grow, and change throughout their lives. This discipline, which can help individuals better understand themselves and their relationships, is broad. As such, it can be used in various professional settings and career paths.

What Are the Eight Stages of Human Development?

If human development is the study of how people change throughout their lives, how and when does this development happen? Many scientists and psychologists have studied various aspects of human development, including ego psychologist Erik Erikson. He examined the impact of social experiences throughout an individual’s life and theorized that  psychosocial development happens in eight sequential parts . What are the eight stages of human development?

Stage 1 — Infancy: Trust vs. Mistrust

In the first stage of human development, infants learn to trust based on how well their caregivers meet their basic needs and respond when they cry. If an infant cries out to be fed, the parent can either meet this need by feeding and comforting the infant or not meet this need by ignoring the infant. When their needs are met, infants learn that relying on others is safe; when their needs go unmet, infants grow up to be less trusting.

Stage 2 — Toddlerhood: Autonomy vs. Shame and Doubt

In addition to autonomy versus shame and doubt, another way to think of the second stage is independence versus dependence. Like in the first stage, toddlers go through this stage responding to their caregivers. If caregivers encourage them to be independent and explore the world on their own, toddlers will grow up with a sense of self-efficacy. If the caregivers hover excessively or encourage dependence, these toddlers grow up with less confidence in their abilities.

For example, if a toddler wants to walk without assistance in a safe area, the caregiver should encourage this autonomy by allowing the independent behavior. If the caregiver insists on holding the toddler’s hand even when it’s not necessary, this attention can lead to doubt later in life.

Stage 3 — Preschool Years: Initiative vs. Guilt

During the preschool years, children learn to assert themselves and speak up when they need something. Some children may state that they’re sad because a friend stole their toy. If this assertiveness is greeted with a positive reaction, they learn that taking initiative is helpful behavior. However, if they’re made to feel guilty or ashamed for their assertiveness, they may grow up to be timid and less likely to take the lead.

Stage 4 — Early School Years: Industry vs. Inferiority

When children begin school, they start to compare themselves with peers. If children feel they’re accomplished in relation to peers, they develop strong self-esteem. If, however, they notice that other children have met milestones that they haven’t, they may struggle with self-esteem. For example, a first grader may notice a consistently worse performance on spelling tests when compared with peers. If this becomes a pattern, it can lead to feelings of inferiority.

The key components of Erikson’s model of human development include stage one, infancy, trust versus mistrust; stage two, toddlerhood, autonomy versus shame and doubt; stage three, preschool years, initiative versus guilt; stage four, early school years, industry versus inferiority; stage five, adolescence, identity versus role confusion; stage six, young adulthood, intimacy versus isolation; stage seven, middle adulthood, generativity versus stagnation; and stage eight, late adulthood, integrity versus despair.

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Stage 5 — Adolescence: Identity vs. Role Confusion

The adolescent stage is where the term “identity crisis” originated, and for good reason. Adolescence is all about developing a sense of self. Adolescents who can clearly identify who they are grow up with stronger goals and self-knowledge than teenagers who struggle to break free of their parents’ or friends’ influences. Adolescents who still deeply depend on their parents for social interaction and guidance may experience more role confusion than teenagers who pursue their own interests.

Stage 6 — Young Adulthood: Intimacy vs. Isolation

In young adulthood, which begins roughly at age 20, people begin to solidify their lifelong bonds; many people enter committed relationships or marriages, while others form lifelong friendships. People who can create and maintain these relationships reap the emotional benefits, while those who struggle to maintain relationships may suffer from isolation. A young adult who develops strong friendships in college may feel more intimacy than one who struggles to form and maintain close friendships.

Stage 7 — Middle Adulthood: Generativity vs. Stagnation

In middle adulthood, people tend to struggle with their contributions to society. They may be busy raising children or pursuing careers. Those who feel that they’re contributing experience generativity, which is the sense of leaving a legacy. On the other hand, those who don’t feel that their work or lives matter may experience feelings of stagnation. For example, a middle-aged adult who’s raising a family and working in a career that presumably helps people may feel more fulfilled than an adult who’s working at a day job that feels meaningless.

Stage 8 — Late Adulthood: Integrity vs. Despair

As adults reach the end of life, they look back on their lives and reflect. Adults who feel fulfilled by their lives, either through a successful family or a meaningful career, reach ego integrity, in which they can face aging and dying with peace. If older adults don’t feel that they’ve lived a good life, they risk falling into despair.

Other Theories of Human Development

Although widely used, Erikson’s psychosocial development theory has been critiqued for focusing too much on childhood. Critics claim that his emphasis makes the model less representative of the growth that people experienced in adulthood. Erikson’s model of the stages of human development is only one theory addressing growth and change throughout life, as many other psychologists have researched their own  theories of human development , including the following:

Cognitive Development

Jean Piaget developed the theory of cognitive development. Piaget’s theory is widely used in education programs to prepare teachers to instruct students in developmentally appropriate ways. The theory is based on four stages:

• Sensorimotor —  In the sensorimotor stage (birth to 2 years old), children learn object permanence, which is the understanding that people and objects still exist even when they’re out of view.
• Preoperational —  In the preoperational stage (2-7 years old), children develop symbolic thought, which is when they begin to progress from concrete to abstract thinking. Children in this stage often have imaginary friends.
• Concrete operational —  In the concrete operational stage (7-11 years old), children solidify their abstract thinking and begin to understand cause and effect and logical implications of actions.
• Formal operational —  In the formal operational stage (adolescence to adulthood), humans plan for the future, think hypothetically, and assume adult responsibilities.

Moral Development

Lawrence Kohlberg created a theory of human development based on moral development concepts. The theory comprises the following stages:

• Preconventional —  In the preconventional stage, people follow rules because they’re afraid of punishment and make choices only with their best interests in mind.
• Conventional —  In the conventional stage, people act to avoid society’s judgment and follow rules to maintain the systems and structures that are already in place.
• Postconventional —  In the postconventional stage, a genuine concern for the welfare of others and the greater good of society guides people.

Psychosexual Theory

Sigmund Freud popularized the  psychosexual theory . The theory comprises five stages:

• Oral —  In the oral stage (birth to 1 year old), children learn to suck and swallow and may experience conflict with weaning.
• Anal —  In the anal stage (1-3 years old), children learn to withhold or expel feces and may experience conflict with potty training.
• Phallic —  In the phallic stage (3-6 years old), children discover that their genitals can give them pleasure.
•   Latency —  In the latency stage (roughly 6 years old through puberty), they take a break from these physical stages and instead develop mentally and emotionally.
• Genital —  In the genital stage (puberty through adulthood), people learn to express themselves sexually.

Ideally, children move through each phase fluidly as their sexual libidos develop, but if they’re stuck in any of the phases, they may develop a fixation that hinders their development.

Behavioral Theory

The behavioral theory focuses solely on a person’s behaviors rather than the feelings that go alongside those behaviors. It suggests that behaviors are conditioned in an environment due to certain stimuli. Behavioral theorists believe that behavior determines feelings, so changing behaviors is important because this will in turn change feelings.

The  attachment theory  focuses on the deep relationships between people across their lifetime. An important attachment theory finding is that children must develop at least one strong bond in childhood to trust and develop relationships as adults. The attachment theory comprises four stages:

• Asocial or  pre-attachment   (birth to 6 weeks old)
• Indiscriminate attachment (6 weeks old to 7 months old)
• Specific or discriminate attachment (7-9 months old)
• Multiple attachments (10 months old or later)

Social Learning Theory

The social learning theory builds upon the behavioral theory and postulates that people learn best by observing the behavior of others. They watch how others act, view the consequences, and then make decisions regarding their own behavior accordingly. The four stages in this theory are:

• Reproduction

In the attention stage, people first notice the behavior of others. In the retention stage, they remember the behavior and the resulting consequences. In the reproduction stage, people develop the ability to imitate the behaviors they want to reproduce, and in the motivation stage, they perform these behaviors.

Sociocultural Theory

The  sociocultural theory  ties human development to the society or culture in which people live. It focuses on the contributions that society as a whole makes to individual human development. For example, children who are raised to play outdoors develop differently from children who are raised to play indoors.

An important part of this theory is the zone of proximal development, which is an area of knowledge and skills slightly more advanced than a child’s current level. The zone of proximal development helps teachers think about and plan instruction, so sociocultural theory plays a large role in preservice teacher training.

Resources: More Information on Theories of Human Development

• BetterHelp, “Behavioral Theory, Behavioral Psychology, or Behaviorism? How Behavior and Personality Intersect ”
• Encyclopedia Britannica, “Lawrence Kohlberg’s Stages of Moral Development”
• Healthline, “What Are Freud’s Psychosexual Stages of Development?”
• PositivePsychology.com, “What Is Attachment Theory? Bowlby’s 4 Stages Explained”
• Psychology Today , Social Learning Theory
• SimplyPsychology, “Lev Vygotsky’s Sociocultural Theory”
• SimplyPsychology, Theories of Psychology
• Verywell Mind, “The 4 Stages of Cognitive Development”

What are the differences between human development and developmental psychology? These terms are closely related. In fact, the study of developmental psychology is most people’s entry into human development.

Developmental psychology  is defined as a scientific approach to explaining growth, change, and consistency throughout a lifetime. It uses various frameworks to understand how people develop and transform throughout their lives. The goals of developmental psychology are to describe, explain, and optimize development to improve people’s lives. In the real world, developmental psychology is used in the study of physical, psychological, emotional, social, personality, and perceptual development.

The  study of developmental psychology  can lead to careers in several different fields. Developmental psychologists often work in colleges and universities and focus on research and teaching. Others work in healthcare facilities, clinics, assisted living facilities, hospitals, mental health clinics, or homeless shelters. In these applied settings, their focus is more on assessing, evaluating, and treating people. According to June 2020 data from PayScale, developmental  psychologists earn an average annual salary of about $68,000 .

One more key element of human growth and development left to explore is  genetics . Genetics influences the speed and way in which people develop, though other factors, such as parenting, education, experiences, and socioeconomic factors, are also at play. The multiple genetic factors that affect human growth and development include genetic interactions and sex chromosome abnormalities.

Genetic Interactions

Genes can act in an additive way or sometimes conflict with one another. For example, a child with one tall parent and one short parent may end up between the two of them, at average height. Other times, genes follow a dominant-recessive pattern. If one parent has brown hair and the other has red hair, the red hair gene is the dominant gene if their child has red hair.

Gene-Environment Interactions

Humans’ genetic information is always interacting with the environment, and sometimes this can impact development and growth. For example, if a child in utero is exposed to drugs, the child’s cognitive abilities may be impacted, thus changing the developmental process. In addition, even if a child’s genes would indicate a tall height, if that child experiences poor nutrition as children, it may impact their height.

Sex Chromosome Abnormalities

Sex chromosome abnormalities impact as many as 1 in 500 births. The following syndromes are examples of sex chromosome abnormalities that can impact development:

• Klinefelter syndrome  is the presence of an extra X chromosome in males, which can cause physical characteristics such as decreased muscle mass and reduced body hair and may cause learning disabilities.
• Fragile X syndrome  is caused by a mutation in the FMR1 gene that makes the X chromosome  appear fragile . It can cause intellectual disability, developmental delays, or distinctive physical features such as a long face.
• Turner syndrome  happens when one of the X chromosomes is missing or partially missing. It only affects females and results in physical characteristics like short stature and webbed neck.

Down Syndrome

Down syndrome  is another common example of how genetics can impact development. This chromosomal disorder may cause some individuals to experience physical or intellectual development differences. Down syndrome occurs at the 21st chromosomal site, in which people with Down syndrome have three chromosomes rather than two.

Those with Down syndrome often have different physical characteristics and may be prone to physical problems like heart defects and hearing problems. Most individuals with Down syndrome have intellectual impairment, but the degree of this impairment varies from person to person.

The top reasons for studying human development are to gain an understanding of your own life experience, help others understand what they’re going through, understand the relationship of society and individual growth, lead more effectively, and support the physical and mental health of others.

The study of human growth and development offers a wealth of value for personal and professional growth and understanding. Many reasons exist for why we study human growth and development.

Common benefits include the following:

• To  gain a better understanding  of one’s own life experiences. This can help people personally reach an understanding of what childhood events shaped their adulthood.
• To  gain knowledge  of how social context impacts development. This knowledge can be invaluable for professionals like teachers as they gain a deeper understanding of their students.
• To  help others understand and contextualize  the ups and downs of life. This helps therapists and psychologists better aid their clients in self-discovery.
• To  understand how societal change can support growth  and development. This understanding helps decision-makers in schools change the educational culture for the better.
• To  become a more effective research, teacher, or leader  in many different industries. Understanding human development deeply and in context has many professional benefits that can lead to greater insight.
• To  support the physical and mental health of individuals  throughout their life span. Professionals like doctors, nurses, and therapists must understand human growth and development to better support their clients.

Students may choose to study human growth and development because of its array of applications across many professional fields. For example, students who want to become elementary school teachers may take courses on the stages of human development to understand cognitive development and how children’s brains grow and change.

Human development is a wide-reaching and ever-changing discipline. A knowledge of human development can be invaluable to people personally as they continue to learn and grow throughout their lives and professionally as they learn to apply what they’ve learned to their careers.

Infographic Sources

Financial Express, “The Eight Stages of Human Development”

VeryWell Mind, “5 Reasons to Study Human Development”

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Essay on Human Development

Students are often asked to write an essay on Human Development in their schools and colleges. And if you’re also looking for the same, we have created 100-word, 250-word, and 500-word essays on the topic.

Let’s take a look…

100 Words Essay on Human Development

The concept of human development.

Human development is a process of enlarging people’s freedoms and improving their well-being. It involves increasing the choices and opportunities for all people.

Dimensions of Human Development

There are three main dimensions: health, education, and living standards. Health is measured by life expectancy, education by years of schooling, and living standards by income.

The Importance of Human Development

Human development is crucial. It helps societies to progress, reduces poverty, and promotes equality. It’s a way to help everyone live a productive and fulfilling life.

Challenges in Human Development

Despite its importance, many challenges exist, like inequality, environmental degradation, and political instability. Overcoming these challenges is vital for sustainable human development.

250 Words Essay on Human Development

Introduction.

Human development, a multidimensional concept, is a process of enlarging people’s freedoms and improving their well-being. It encompasses the enhancement of both individual potential and societal growth, focusing on aspects such as education, health, standard of living, and participation in societal activities.

Theoretical Framework

The Human Development Index (HDI), introduced by the United Nations Development Programme, quantifies human development. It emphasizes three fundamental dimensions: knowledge, longevity, and decent standard of living. However, human development is not merely a function of these quantifiable elements; it also involves intangible aspects such as freedom, dignity, and autonomy.

Role of Education

Education plays a central role in human development. It equips individuals with knowledge and skills, empowering them to contribute to societal progress. Education fosters creativity and innovation, driving technological advancements and economic growth.

Health and Living Standards

Health is another crucial component. A healthy population is more productive, contributing to economic growth and societal development. Additionally, a decent standard of living, characterized by access to basic needs and services, is vital for human development.

Societal Participation

Active societal participation promotes inclusivity and equality, essential elements of human development. It enables individuals to contribute to and benefit from societal progress, fostering a sense of belonging and mutual respect.

In conclusion, human development is a comprehensive and nuanced concept. It encompasses not only economic growth but also aspects such as education, health, living standards, and societal participation. It is about creating an environment where individuals can develop their full potential and lead productive, creative lives in accord with their needs and interests.

500 Words Essay on Human Development

Human development is an intricate interplay of biological, psychological, and sociocultural processes that begin at conception and continue throughout the lifespan. It encompasses the growth and maturation of the human being, including physical, cognitive, emotional, and social changes.

The Biological Perspective

From the biological standpoint, human development begins with genetics. Our genetic makeup, coupled with environmental influences, guides our physical growth and maturation. This includes the development of the brain, motor skills, and health. Understanding the biological aspects of human development allows us to grasp why we are the way we are, and how our physical attributes and health conditions may influence our life experiences.

The Psychological Perspective

The psychological perspective focuses on the development of mental processes, behaviors, and emotions. Cognitive development theory, proposed by Jean Piaget, suggests that individuals pass through different stages of cognitive growth as they mature. This theory underscores the importance of experiences and interactions in shaping our cognitive abilities, personality, and emotional well-being.

The Sociocultural Perspective

The sociocultural perspective emphasizes the impact of social and cultural factors on human development. According to Lev Vygotsky’s sociocultural theory, our cognitive development is heavily influenced by our social interactions and cultural context. This perspective highlights the importance of understanding the cultural and social norms, values, and expectations that shape our behaviors and identities.

Interplay of Factors

It is important to recognize that these perspectives do not exist in isolation. They interact in complex ways to shape human development. For instance, our biological makeup may influence our cognitive abilities, which in turn can be shaped by our sociocultural environment. Similarly, our sociocultural context may impact our physical health through factors such as diet, lifestyle, and access to healthcare.

Human Development Index

To measure human development, the United Nations uses the Human Development Index (HDI). The HDI is a summary measure of average achievement in key dimensions of human development: a long and healthy life, being knowledgeable, and having a decent standard of living. It is a standard means of measuring well-being, especially child welfare.

In conclusion, human development is a multifaceted process influenced by biological, psychological, and sociocultural factors. It is a continuous journey that shapes our physical attributes, cognitive abilities, emotional well-being, and social interactions. Understanding these factors and their interplay can provide valuable insights into human behavior and well-being, and guide efforts to promote healthy development and improve quality of life. The HDI, while not perfect, gives us a tool to measure and compare human development across different contexts.

That’s it! I hope the essay helped you.

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• Essay on Development of Rural Areas
• Essay on Development
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What is Development?

Human Development or Lifespan Development is the scientific study of the ways in which people change, as well as remain the same, from conception to death. You will discover that the field, known more broadly as developmental science , examines changes and stability across multiple domains of psychological and social functioning. These include physical and neurophysiological processes, cognition, language, emotion, personality, moral, and psychosocial development, including our relationships with others.

Originally concerned with infants and children, the field has expanded to include adolescence and more recently, aging and the entire life span. Previously, the message was once you are 25, your development is essentially completed. Our academic knowledge of the lifespan has changed, and although there is still less research on adulthood than on childhood, adulthood is gaining increasing attention. This is particularly true now that the large cohort known as the “baby boomers” are beginning to enter late adulthood. The assumption that early childhood experiences dictate our future is also being called into question. Instead, we have come to appreciate that growth and change continues throughout life and experience continues to have an impact on who we are and how we relate to others. We now recognize that adulthood is a dynamic period of life marked by continued cognitive, social, and psychological development.

You will also discover that developmental psychologists investigate key questions, such as whether children are qualitatively different from adults or simply lack the experience that adults draw upon. Other issues they consider include the question of whether development occurs through the gradual accumulation of knowledge or through qualitative shifts from one stage of thinking to another, or if children are born with innate knowledge or figure things out through experience, and whether development is driven by the social context or something inside each child. From these questions, you may already be thinking that developmental psychology is related to other applied fields. You are right. Developmental science informs many applied fields, including, educational psychology, developmental psychopathology, and intervention science. It also complements several other basic research fields in psychology including social psychology, cognitive psychology, and cross-cultural psychology. Lastly, it draws from the theories and research of several scientific fields including biology, sociology, health care, nutrition, and anthropology.

Learning Objectives: Lifespan Perspective

• Explain the lifespan perspective and its assumptions about development
• Differentiate periods of human development
• Identify key assumptions and major meta-theories underlying lifespan development 
• Identify major historical and contemporary theories focusing on lifespan development

Lifespan Perspective

Paul Baltes identified several underlying principles of the lifespan perspective (Baltes, 1987; Baltes, Lindenberger, & Staudinger, 2006).

• Development is lifelong . Lifespan theorists believe that development is life-long, and change is apparent across the lifespan. No single age period is more crucial, characterizes, or dominates human development. Consequently, the term lifespan development will be used throughout the textbook.
• Development is multidirectional and multidimensional.  Lifespan researchers hold that different people follow different developmental pathways, and proceed along pathways at different rates. Even within the same person, different dimensions or domains of development can change in different ways.
• Development includes both gains and losses . Lifespan theorists do not agree with the traditional view of development that childhood is a period characterized by developmental gains, whereas old age is a time of loss. Instead, the lifespan approach holds that at every age, we may show gains in some areas of development, while showing losses in other areas. Every change, whether it is finishing high school, getting married, or becoming a parent, entails both growth and loss.
• Development is characterized by plasticity. Plasticity is about malleability , or our potential to change and to follow a wide range of developmental pathways.  For instance, plasticity is illustrated in the brain’s ability to learn from experience and the many ways it can recover from injury.
• Development is embedded in historical and cultural contexts. Lifespan researchers believe that d evelopment is influenced by the many social contexts in which it unfolds. How  people develop will depend on their societal and cultural contexts, and on the historical period during which their development takes place.
•   Development is multiply determined. Lifespan theorists argue that development is caused by multiple factors, and is always shaped by  both biological and environmental factors. In addition, the individual plays an active role in their own development.
• Development is multidisciplinary. As mentioned at the start of the chapter, human development is such a vast topic of study that it requires the theories, research methods, and knowledge bases of many academic disciplines.

Contextualism as paradigm.  Baltes (1987) identified three specific developmental systems of influence, all of which include biological and environmental forces.

• Normative age-graded influences: An age-grade is a specific age group, such as toddler, adolescent, or senior . Humans experience particular age-graded social experiences (e.g., starting school) and biological changes (e.g., puberty).
• Normative history-graded influences: The time period in which you are born (see Table 1.1) shapes your experiences. A cohort is a group of people who are born at roughly the same period in a particular society. These people travel through life often experiencing similar historical changes at similar ages. History-graded influences include both environmental determinants (e.g., historical changes in the job market) and biological determinants (e.g., historical changes in life expectancy).
• Non-normative influences : People’s development is also shaped by specific influences that are not organized by age or historical time, such as immigration, accidents, or the death of a parent. These can be environmental (e.g., parental mental health issues) or biological (e.g., life threatening illness).

Table 1.1. Which generation (cohort) are you?

adapted from Lally & Valentine-French, 2019

Domains of development. We change across three general domains/dimensions; physical, cognitive, and psychosocial. The physical domain includes changes in height and weight, sensory capabilities, the nervous system, as well as the propensity for disease and illness . The cognitive domain encompasses the changes in intelligence, wisdom, perception, problem-solving, memory, and language. The psychosocial domain focuses on changes in emotion, self-perception and interpersonal relationships with families, peers, and friends. All three domains influence each other. It is also important to note that a change in one domain may cascade and prompt changes in the other domains. For instance, an infant who has started to crawl or walk will encounter more objects and people, thus fostering developmental change in the child’s understanding of the physical and social world.

Contextual perspectives , like the lifespan approach, highlight societal contexts that influence our development. An important societal factor is our social standing, socioeconomic status, or social class. Socioeconomic status (SES) is a way to identify families and households based on their shared levels of education, income, and occupation. While there is certainly individual variation, members of a social class tend to share similar privileges, opportunities, lifestyles, patterns of consumption, parenting styles, stressors, religious preferences, and other aspects of daily life. All of us born into a class system are socially located, and we may move up or down depending on a combination of both socially and individually created limits and opportunities.

Families with higher socioeconomic status usually are in occupations (e.g., attorneys, physicians, executives) that not only pay better, but also grant them a certain degree of freedom and control over their job. Having a sense of autonomy or control is a key factor in experiencing job satisfaction, personal happiness, and ultimately health and well-being (Weitz, 2007). Those families with lower socioeconomic status are typically in occupations that are more routine, more heavily supervised, and require less formal education. These occupations are also more subject to job disruptions, including lay-offs and lower wages.

Poverty level is an income amount established by the federal government that is based on a set of thresholds that vary by family size (United States Census Bureau, 2016). If a family’s income is less than the government threshold, that family is considered in poverty. Those living at or near poverty level may find it extremely difficult to sustain a household with this amount of income. Poverty is associated with poorer health and a lower life expectancy due to poorer diet, less healthcare, greater stress, working in more dangerous occupations, higher infant mortality rates, poorer prenatal care, greater iron deficiencies, greater difficulty in school, and many other problems. Members of higher income status may fear losing that status, but the poor may have greater concerns over losing housing.

Today we are more aware of the variations in development and the impact that culture and the environment have on shaping our lives. Culture is the totality of our shared language, knowledge, material objects, and behavior. It includes ideas about what is right and wrong, what to strive for, what to eat, how to speak, what is valued, as well as what kinds of emotions are called for in certain situations. Culture teaches us how to live in a society and allows us to advance because each new generation can benefit from the solutions found and passed down from previous generations. Culture is learned from parents, schools, houses of worship, media, friends and others throughout a lifetime. The kinds of traditions and values that evolve in a particular culture serve to help members function and value their own society. We tend to believe that our own culture’s practices and expectations are the right ones. This belief that our own culture is superior is called ethnocentrism and is a normal by-product of growing up in a culture. It becomes a roadblock, however, when it inhibits understanding of cultural practices from other societies. Cultural relativity is an appreciation for cultural differences and the understanding that cultural practices are best understood from the standpoint of that particular culture.

Culture is an extremely important context for human development and understanding development requires being able to identify which features of development are culturally based. This understanding is somewhat new and still being explored. Much of what developmental theorists have described in the past has been culturally bound and difficult to apply to various cultural contexts. The reader should keep this in mind and realize that there is still much that is unknown when comparing development across cultures.

Lifespan vs. Life expectancy: At this point you must be wondering what the difference between lifespan and life expectancy is, according to developmentalists. Lifespan , or longevity, refers to the maximum age any member of a species can reach under optimal conditions . For instance, the grey wolf can live up to 20 years in captivity, the bald eagle up to 50 years, and the Galapagos tortoise over 150 years (Smithsonian National Zoo, 2016). The longest recorded lifespan for a human was Jean Calment who died in 1994 at the age of 122 years, 5 months, and 14 days (Guinness World Records, 2016). Life expectancy is the average number of years a person born in a particular time period can typically expect to live (Vogt & Johnson, 2016).

Conceptions of Age

How old are you? Chances are you would answer that question based on the number of years since your birth, or what is called your chronological age . Ever felt older than your chronological age? Some days we might “feel” like we are older, especially if we are not feeling well, are tired, or are stressed out. We might notice that a peer seems more emotionally mature than we are, or that they are physically more capable. So years since birth is not the only way we can conceptualize age.

Biological age: Another way developmental researchers can think about the concept of age is to examine how quickly the body is aging , this is your biological age . Several factors determine the rate at which our body ages. Our nutrition, level of physical activity, sleeping habits, smoking, alcohol consumption, how we mentally handle stress, and the genetic history of our ancestors, to name but a few.

Psychological age: Our psychologically adaptive capacity compared to others of our chronological age is our psychological age . This includes our cognitive capacity along with our emotional beliefs about how old we are. An individual who has cognitive impairments might be 20 years of age, yet has the mental capacity of an 8-year-old. A 70- year-old might be travelling to new countries, taking courses at college, or starting a new business. Compared to others of our age group, we may be more or less active and excited to meet new challenges. Remember you are as young or old as you feel.

Social age: Our social age is based on the social norms of our culture and the expectations our culture has for people of our age group . Our culture often reminds us whether we are “on target” or “off target” for reaching certain social milestones, such as completing our education, moving away from home, having children, or retiring from work. However, there have been arguments that social age is becoming less relevant in the 21st century (Neugarten, 1979; 1996). If you look around at your fellow students at college you might notice more people who are older than traditional aged college students, those 18 to 25. Similarly, the age at which people are moving away from the home of their parents, starting their careers, getting married or having children, or even whether they get married or have children at all, is changing.

Those who study lifespan development recognize that chronological age does not completely capture a person’s age. Our age profile is much more complex than this. A person may be physically more competent than others in their age group, while being psychologically immature. So, how old are you?

Table 1.2 Age Periods of Development

Table 1.2 shows the developmental periods that will be explored in this book, starting with prenatal development and continuing thought late adulthood to death. Both childhood and adulthood are divided into multiple developmental periods. So, while both an 8-month old and an 8-year-old are considered children, they have very different motor abilities, social relationships, and cognitive skills. Their nutritional needs are different and their primary psychological concerns are also distinctive. The same is true of an 18-year-old and an 80-year-old, even though both are considered adults.

Prenatal Development : Conception occurs and development begins. All of the major structures of the body are forming, and the health of the mother is of primary concern. Understanding nutrition, teratogens , or environmental factors that can lead to birth defects , and labor and delivery are primary concerns.

Infancy and Toddlerhood : The first two years of life are ones of dramatic growth and change. A newborn, with a keen sense of hearing but very poor vision, is transformed into a walking, talking toddler within a relatively short period of time. Caregivers are also transformed from someone who manages feeding and sleep schedules to a constantly moving guide and safety inspector for a mobile, energetic child.

Early Childhood: This period is also referred to as the preschool years and consists of the years that follow toddlerhood and precede formal schooling. As a two to six-year-old, the child is busy learning language, gaining a sense of self and greater independence, and  beginning to understand the workings of the physical world.

Middle and Late Childhood: The ages of six to the onset of puberty comprise middle and late childhood, and much of what children experience at this age is connected to their involvement in the early grades of school. Now the world becomes one of learning and testing new academic skills, and assessing one’s abilities and accomplishments by making comparisons between self and others.

Adolescence : Adolescence is a period of dramatic physical change marked by an overall growth spurt and sexual maturation, known as puberty . It is also a time of cognitive change as the adolescent begins to think of new possibilities and to consider abstract concepts such as love, fear, and freedom. At the same time, adolescents have a sense of invincibility that puts them at greater risk of accidents or contracting sexually transmitted infections that can have lifelong consequences.

Emerging Adulthood: The period of emerging adulthood is a transitional time between the end of adolescence and before individuals acquire all the benchmarks of adulthood. Continued identity exploration and preparation for full independence from parents are negotiated. Although at one’s physiological peak, emerging adults are most at risk for involvement in violent crimes and substance abuse.

Early Adulthood : The twenties and thirties are identified as early adulthood. Intimate relationships, establishing families (of all shapes and sizes), and work are primary concerns at this stage of life.  For adults with children, developmental changes can become organized around the family life cycle.

Middle Adulthood : The forties through the mid-sixties are referred to as middle adulthood. This is a period in which aging becomes more noticeable and when many people are at their peak of productivity in love and work.  At this age, some people are negotiating adolescent children and aging parents at the same time.

Late Adulthood : Late adulthood is sometimes subdivided into two categories: The young-old who are from 65-84 years and the oldest-old who are 85 years and older. One of the primary differences between these groups is that the young-old are still relatively healthy, productive, active, and the majority continue to live independently. With both age groups the risks of diseases such as arteriosclerosis, cancer, and cerebral vascular disease increase substantially.

Meta-theories of Human Development

The study of development is guided by the assumptions researchers hold about the nature of humans and their development. These assumptions are called meta-theories . “Meta” means “above” or “beyond,” like “meta-physics.” Other terms used to describe meta-theories are “world views,” “cosmologies,” “perspectives,” or “paradigms,” as in “paradigm shifts.” Explicit discussions of meta-theories are found most often in philosophy.

What are meta-theories of human development?

Meta-theories (or world views or paradigms) of human development are sets of assumptions people hold about the nature of humans and the meaning of development — what it looks like, how it happens, what causes it. These assumptions are important because everyone has them, including researchers, but they are often implicit, meaning we are not always consciously aware of them. In the study of development, such assumptions influence everything about how research is conducted: the questions we ask, the measures and methods that are used, and the interpretation of data. For example, if researchers assume that development ends at 18, they do not look for developmental changes after that age. Or, if researchers assume that aging is a process of decline, then they never look for characteristics that might improve as people get older.

All researchers have meta-theories, since assumptions are baked into the theories and methodologies they use. But researchers are often unaware of them, and so these assumptions are rarely acknowledged. It is important to note that meta-theories are not just cold cognitions. They are often deeply held convictions that researchers will fiercely defend. Typically researchers think that their assumptions are self-evident truths. They are often convinced that their assumptions are right and everyone else’s are wrong.

Researchers holding different meta-theories can have difficulty communicating with each other. Since they are asking different questions and using different truth criteria for research, they often argue past each other or misunderstand each other. One group of researchers will offer what they consider to be irrefutable proof of their ideas, which other researchers then dismiss as irrelevant. Discrepancies, inconsistencies, arguments, and furor often characterize an area of study in which researchers from multiple meta-theories are working.

What kinds of assumptions guide the study of human development?

We consider six key assumptions. You may have heard of many of them, since they are perennial issues in the study of development. They include:

• Assumptions about human nature : whether people are born as blank slates ( tabula rasa ) or whether people are inherently good or inherently bad.
• Assumptions about the causes of development : whether development is determined by nature (genes, biology) or determined by nurture (environment, learning).
• Assumptions about the role of the individual in his or her own development: whether people are passive participants, reacting to external forces or whether they are active in choosing and shaping their own development.
• Assumptions about stability vs. change : whether traits, characteristics, and experiences early in life have permanent effects or whether people are malleable and open to change throughout life.
• Assumptions about continuity vs. discontinuity : whether development involves quantitative incremental change or qualitative shifts.
• Assumptions about universality vs. context specificity : whether development follows a universal pathway or depends more on specific experiences and environmental contexts.

Nature of humans. What is the nature of humans? These assumptions refer to beliefs about the underlying qualities of our species– whether humans are born as blank slates ( tabula rasa ) or whether we all bring intrinsic human characteristics with us into the world. For example, these different assumptions are readily apparent in alternative conceptualizations of motivation—some theories assume that motives and motivation are all acquired, whereas others assume that all humans come with intrinsic motivations.

Nature and Nurture: Why are you the way you are? As you consider some of your features (height, weight, personality, being diabetic, etc.), ask yourself whether these features are a result of heredity or environmental factors, or both. Chances are, you can see the ways in which both heredity and environmental factors (such as lifestyle, diet, and so on) have contributed to these features. For decades, scholars have carried on the “nature/nurture” debate. For any particular feature, those on the side of nature would argue that heredity plays the most important role in bringing about that feature. Those on the side of nurture would argue that one’s environment is most significant in shaping the way we are. This debate continues in all aspects of human development, and most scholars agree that there is a constant interplay between the two forces. It is difficult to isolate the root of any single behavior as a result solely of nature or nurture.

Active versus Passive: How much do you play a role in your own developmental path? Are you at the whim of your genetic inheritance or the environment that surrounds you? Some theorists see humans as playing a much more active role in their own development. Piaget, for instance believed that children actively explore their world and construct new ways of thinking to explain the things they experience. In contrast, many behaviorists view humans as being more passive in the developmental process.

Stability versus Change: How similar are you to how you were as a child? Were you always as out-going or reserved as you are now? Some theorists argue that the personality traits of adults are rooted in the behavioral and emotional tendencies of the infant and young child. Others disagree, and believe that these initial tendencies are modified by social and cultural forces over time.

Continuity versus Discontinuity: Is human development best characterized as a slow, gradual process, or is it best viewed as one of more abrupt change? The answer to that question often depends on which developmental theorist you ask and what topic is being studied. The theories of Freud, Erikson, Piaget, and Kohlberg are called stage theories. Stage theories or discontinuous development assume that developmental change occurs in distinct stages that are qualitatively different from each other, and that unfold in a set, universal sequence . At each stage of development, children and adults have different qualities and characteristics. Thus, stage theorists assume development is discontinuous. Others, such as the behaviorists, Vygotsky, and information processing theorists, assume development is a more slow and gradual process known as continuous development . For instance, they would see the adult as not possessing new skills, but as using more advanced skills that were already present in some form in the child. Brain development and environmental experiences contribute to the acquisition of more developed skills.

Universal vs. context specific . A final assumption focuses on whether pathways of development are presumed to be (1) normative and universal, meaning that all people pass through them in the same sequence, or (2) differential and specific, meaning that a variety of different patterns and pathways of developmental change are possible depending on the individual and the context. Some theorists, like Piaget or Erickson, assume that everyone progresses through the same stages of cognitive development in the same order, or that everyone negotiates the same set of developmental tasks at about the same ages. Other theorists, who endorse lifespan or ecological systems approaches, believe that development can take on a wide variety of patterns and pathways, depending on the specific cultural, historical, and societal under which it unfolds.

What are the guiding meta-theories in human development?

These six basic assumptions are clustered into “packages” that go together. Clusters are organized around metaphors, which are at the root of meta-theories of humans and their development. We consider four meta-theories, each with its own metaphor: (1) humans as seeds , as depicted by Maturational meta-theories; (2) humans as machines , as depicted in Mechanistic meta-theories (3) humans as butterflies , as depicted in Organismic meta-theories; and (4) humans as participants in a tennis game, conversation, or dance , as depicted by Contextualist meta-theories. For an overview of these guiding meta-theories, see this chart [pdf] .

• Maturational meta-theory : Maturational meta-theories can be understood using the plant as a metaphor. It is as if humans develop the same way as plants. The important thing to study is people’s “seeds,” that is, their genetic make-up. People are assumed to be passive, the product of their genes. The environment can provide support and nutrition (rain, sun, and soil), but can’t change a person’s nature (poppy seeds will always produce poppies). The role of the person is to be reactive—to their genes. The course of development will be continuous or discontinuous depending on the genetic program, although acorns always grow into oak trees.
• Mechanistic meta-theory : Mechanistic meta-theories can be understood using the machine as a metaphor. It is as if humans change the same way as machines. People are assumed to be made up of pieces that can be studied apart from the rest of them. They are passive, with the energy coming from outside (like gasoline for a car). Development is continuous and people do not develop into something else (a car stays a car). The person can only react to the environment that is controlling them (like a car responding to the gas pedal or the brake). All causes for development come from the outside, from environmental forces.
• Organismic meta-theory : Organismic meta-theories can be understood using the butterfly as a metaphor. It is as if humans develop the same way as butterflies. People are assumed to be made up of structured wholes. Their nature is to be curious, interested, and open to growth. They are active and develop through discontinuous qualitatively different stages (like the caterpillar, chrysalis, and butterfly). People construct their own next steps in development based on the affordances and opportunities provided by the environment. Development is caused by imbalances that lead to structural reorganizations. Development is progressive (gets better) and only goes in one direction (from caterpillar toward butterfly) and not the reverse.
• Contextual meta-theory : Contextual meta-theories can be understood using the tennis game (or dance) as a metaphor. It is as if humans’ development is like a game of tennis or a dance. The important thing to study is the back and forth between the person and his or her context, both of which are assumed to be proactive and acting on their own agendas. Development can be continuous or discontinuous depending on how the game is played. Both person and environment are active partners in the system, which can lead to transformations in both.

What are examples of theories that fall within each meta-theory?

Nested within each higher-order meta-theory are sets of lower-level approaches or theories called “families” of perspectives or theories to denote that they share common properties, based on their similarity to the root metaphors and characteristics of the guiding meta-theories. This table contains several examples of “big” theories of development and provides an analysis of their defining features according to the meta-theoretical assumptions we have been discussing [pdf]. Based on this analysis, we indicate the higher-order family to which we think each big theory or approach belongs.

Although maturational meta-theories were prevalent in the beginning of the 20th century, their popularity has waxed and waned since then, and they have taken on many different forms. These include some formulations of behavioral genetics, sociobiology, evolutionary, ethological, neuroscience, temperament, and personality theories. Maturational assumptions are signaled by concepts such as “trait,” the search for “the aggression gene,” the discovery of the brain system, hormone, or neurotransmitter responsible for a specific condition, or any other terms that suggest development is solely the product of innate or immutable characteristics of individuals. Although they are not typically referred to as “maturational,” there are many kinds of theories that place all the active ingredients of behavior or development inside the head (or more specifically the social cognitions) of the person. Even if they are not direct descendants, these theories can be considered cousins of Maturational meta-theories because they are exclusively focused on the role of the individual.

The prototypic Mechanistic theories are behaviorist, operant, and classical conditioning learning theories, like social learning theory. This family of theories dominated psychology from the early to the mid-20th century, but Mechanistic theories are still alive and well in many areas, such as learning and motivation, and especially in many theories that have been adapted for use in educational systems. New kinds of machines serve as prototypes for mechanistic theories of memory, learning, and automatic functioning—focusing on the computer, the robot, and the automaton. Such assumptions have even pervaded our understanding of biological systems, as seen in metaphors like “the brain is a computer.” And although the “cognitive revolution” was supposed to have overthrown behaviorist assumptions, some cognitivistic theories treat humans as if they were information processing machines.

Perhaps surprisingly, there are also mechanistic assumptions embedded in certain progressive analyses of the effects of societal and social conditions, such as poverty, oppression, racism, and discrimination, which sometimes seem to imply that these external forces are the sole determinants of the development of stereotypes or implicit attitudes. In this case, because all people are presumed to passively internalize these societal prejudices, psychological phenomena are modeled after the metaphor of the “Xerox machine.” Just as in Maturational meta-theories, where humans could be seen as “hosts” to their genes, who were really running the show, in Mechanistic meta-theories, humans can be seen as “hosts” to their own behaviors, which are automatically reflexively produced based on previous social programming.

The prototypical Organismic theory is Piaget’s constructivist theory of cognitive and affective development, and the several neo-constructivist theories that were inspired by Piaget, for example, Kohlberg’s theory of the development of moral reasoning. Other theories living under the Organismic umbrella include Werner’s comparative psychology, focusing on the orthogenetic principle of differentiation and integration, and Erikson, who posited universal age-graded developmental tasks. Other theories that claim kinship with Organismic meta-theories (e.g., theories of intrinsic motivation) do not typically include notions of universal stages or tasks, but focus instead on Organismic assumptions about the nature of humans, specifically, that humans are innately active, curious, and interested, and inherently desire to explore, understand, and fit in with their social and physical environments. With the rise of radical contextualism and cultural relativism in psychology, theories of “universal” anything (e.g., psychological needs, stages, developmental tasks) have come increasingly under attack.

Some of the better-known members of the Contextualist family include Bronfenbrenner’s bio-ecological model and the lifespan approach, both of which arose in reaction to dominant meta-theories of their day (experimental child psychology and Piagetian psychology, respectively), with their almost exclusive focus on the child as a developing individual. The “contextualist” moniker reflects these perspectives’ insistence that development unfolds within and is shaped by higher-order multi-level ecological or contextual forces outside the individual, such as microsystem settings, and societal, cultural, and historical contexts.

Does the field of psychology have meta-theories?

During different historical periods, specific meta-theories dominated the field of psychology. For example, during the 1940s and 1950s, behaviorism held sway. In the 1960s, Piaget’s theories were introduced to the United States and captured the field’s attention. Some fierce theoretical and empirical battles were fought between behaviorists and Piagetians.

When a specific meta-theory governs the field, it becomes very difficult for researchers from opposing meta-theories to work—they have trouble getting funding, they have trouble getting their research findings published, and they are marginalized by other researchers. For example, when the area of motivation was dominated by behaviorists (who believed that all behavior was motivated by rewards and punishments), it was very difficult for researchers to study and publish research on intrinsic motivation.

What is the dominant meta-theory in the field today?

“Cognitivism” is a guiding meta-theory in the field of psychology today. “Cognitivism” is the assumption that all the causal factors that shape human behavior and development are inside the mind or belief system of the person. You can hear the assumptions in the theories of the field: self-efficacy, self-esteem, attributions, perceived social support, values, sense of purpose, goal orientations, internal working model, identity, and so on.

The paradigm that is currently taking over the field of psychology is neuroscience . That is, the brain is in charge of behavior, and neurobiology is destiny. Some branches of neuroscience are predominantly Maturational , as seen in discussions of the brain systems responsible for certain actions, predilections, and characteristics. Other branches are more Contextual , for example, research on neuroplasticity, which examines the way that social contexts and interactions shape the developing brain.

News flash : In the field of psychology outside developmental, most researchers assume that people don’t develop. In personality, social, cognitive, and industrial-organizational psychology, researchers largely examine individual differences as indicators of people’s permanent characteristics.

Who else has meta-theories?

Everyone has meta-theories about human nature and development: parents, teachers, nurses, social workers, doctors, business people, artists, politicians, and so on.

For example,

• doctors assume that weight loss is all about diet and exercise (nurture), so no one can do research on physiological differences in metabolism (nature).
• teachers have assumptions about whether students come with motivation (nature) or have to be motivated from the outside (nurture), and organize their classrooms accordingly.
• parents often argue about the nature of children’s development, whether it’s just the child’s personality (maturational), or the child is going through a normal stage (organismic), or if they are rewarding the wrong behavior (mechanistic).

What is the meta-theory that guides our class and this book?

Our class endorses a life-span perspective on human development, a contextualist perspective that fought its way through the dominant perspectives in child psychology (e.g., development ends at age 18), starting in the 1980s to become one of the dominant meta-theories governing the field of developmental science today. Note that your instructors chose your book, so their meta-theory is influencing the meta-theoretical filter through which you are learning about development.

What is the correct meta-theory?

There is no single correct definition of development or meta-theory. Really. Even the lifespan approach has its drawbacks.

However, as research accumulates, many theories derived from certain meta-theories have been found to be incomplete—so far researchers have not found any significant aspect of development that is caused only by nature or only by nurture. Therefore, most researchers currently say they favor interactionist metatheories, like contextualist or systems meta-theories. However, it is important to look carefully at researchers’ actual work, because sometimes they say that they have one meta-theory, but their work seems to be guided by assumptions from a different meta-theory.

Do I have a meta-theory about development?

Yes, you do. And you can figure out what it is. Although it’s not easy, you can discern your own assumptions about development—by thinking about which assumptions make the most sense to you. You can also see which kinds of theories you prefer and what kinds of recommendations you would make about how to structure development, like how people should parent, teach, or make policies. The hardest part about discovering your own meta-theory is realizing that it is made up of assumptions you have (based on your experiences and messages from society)—that aren’t necessarily true. Our meta-theories sure seem true to each of us!

How do I get rid of my meta-theory?

It’s not really possible to get rid of all of our assumptions. It is our goal to be aware of our own assumptions or meta-theories, to realize that they are not the truth but are our current working models of how the world operates and people develop. The most important thing is to be explicit about our assumptions and to be cognizant of how they are guiding our actions. It is a goal of this class to help students figure out their own assumptions and to help them become (or remain) open to alternative viewpoints.

Adapted from : Ellen Skinner, Glen Richardson, Jennifer Pitzer, and Cynthia Taylor. Portland State University. July 2011.

Historical Theories of Development

Preformationist View : Well into the 18th century, children were merely thought of as little adults. Preformationism , or the belief that a tiny, fully formed human is implanted in the sperm or egg at conception and then grows in size until birth, was the predominant early theory. Children were believed to possess all their sensory capabilities, emotions, and mental aptitude at birth, and as they developed these abilities unfolded on a predetermined schedule (Thomas, 1979). The environment was thought to play no role in determining development .

John Locke (1632-1704): Locke, a British philosopher, refuted the idea of innate knowledge and instead proposed that children are largely shaped by their social environments, especially their education as adults teach them important knowledge. He believed that through education a child learns socialization, or what is needed to be an appropriate member of society. Locke advocated thinking of a child’s mind as a tabula rasa or blank slate , and whatever comes into the child’s mind comes from the environment. Locke emphasized that the environment is especially powerful in the child’s early life because he considered the mind the most pliable then. Locke indicated that the environment exerts its effects through associations between thoughts and feelings, behavioral repetition, imitation, and rewards and punishments (Crain, 2005). Locke’s ideas laid the groundwork for the behavioral perspective and subsequent learning theories of Pavlov, Skinner and Bandura.

Jean-Jacques Rousseau (1712-1778): Like Locke, Rousseau also believed that children were not just little adults. However, he did not believe they were blank slates, but instead developed according to a natural plan which unfolded in different stages (Crain, 2005). He did not believe in teaching them the correct way to think, but believed children should be allowed to think by themselves according to their own ways and an inner, biological timetable. This focus on biological maturation resulted in Rousseau being considered the father of developmental psychology. Followers of Rousseau’s developmental perspective include Gesell, Montessori, and Piaget.

Arnold Gesell (1880-1961): Gesell spent 50 years at the Yale Clinic of Child Development, and with his colleagues he studied the neuromotor development of children. Gesell believed that the child’s development was activated by genes and he called this process maturation (Crain, 2005). Further, he believed that development unfolded in fixed sequences, and he opposed efforts to teach children ahead of schedule as he believed they will engage in behaviors when their nervous systems had sufficiently matured.

Sigmund Freud (1856-1939): Freud was a very influential figure in the area of development. Freud emphasized the importance of early childhood experiences in shaping our personality and behavior. In our natural state, we are biological beings and are driven primarily by instincts. During childhood, however, we begin to become social beings as we learn how to manage our instincts and transform them into socially acceptable behaviors. His assumptions were that personality formed during the first few years of life. The ways in which parents or other caregivers interacted with children were assumed to have a long-lasting impact on children’s emotional states. His beliefs formed the psychodynamic perspective and his theories of psychosexual development and psychopathology dominated the field of psychiatry until the growth of behaviorism in the 1950s.

However, Freud’s theory has been heavily criticized for several reasons. One is that it is very difficult to test scientifically (Crews, 1998). Freud suggested that much of what determines our actions were unknown to us, and as scientists we cannot measure these unconscious concepts. A second criticism is that Freud’s case studies were not validated and cannot be used as evidence for his theories. Many later theories, particularly behaviorism and humanism, came about as challenges to Freud’s views.

Contemporary Theories on Development

Erikson (1902-1994) and Psychosocial Theory: Now, let’s turn to a less controversial psychodynamic theorist, Erik Erikson. Erikson presents eight developmental stages that encompass the entire lifespan. For that reason, Erikson’s psychosocial theory forms the foundation for much of our discussion of psychosocial development.

Erikson (1950) proposed a model of lifespan development that provides a useful guideline for thinking about the changes we experience throughout life. Erikson broke with Freud’s emphasis on sexuality as the cornerstone of social-emotional development and instead suggested that social relationships fostered development. Erikson proposed that each period of life has a unique challenge or crisis that the person who reaches it must face, referred to as psychosocial crises . According to Erikson, successful development involves dealing with and resolving the goals and demands of each of these psychosocial crises in a positive way. These crises are usually called stages, although that is not the term Erikson used. If a person does not resolve a stage successfully, it may hinder their ability to deal with later stages. For example, the person who does not develop a sense of trust (Erikson’s first stage) may find it challenging as an adult to form a positive intimate relationship (Erikson’s sixth stage). Or an individual who does not develop a clear sense of purpose and identity (Erikson’s fifth stage) may become self-absorbed and stagnate rather than work toward the betterment of others (Erikson’s seventh stage).

However, most individuals are able to successfully complete the eight stages of his theory (See Table 1.3).

Table 1.3 Erikson's Psychosocial Stages

Erikson’s theory has been criticized for focusing so heavily on crises and assuming that the completion of one crisis is a prerequisite for the next crisis of development. His theory also focused on the social expectations that are found in certain cultures, but not in all. For instance, the idea that adolescence is a time of searching for identity might translate well in the middle-class culture of the United States, but not as well in cultures where the transition into adulthood coincides with puberty through rites of passage and where adult roles offer fewer choices.

Learning Theory: Also known as Behaviorism , is based on the premise that it is not possible to objectively study the mind, and therefore psychologists should limit their attention to the study of behavior itself. The most famous behaviorist was Burrhus Frederick (B. F.) Skinner (1904–1990), who expanded the principles of behaviorism and also brought them to the attention of the public at large. Skinner used the ideas of stimulus and response, along with the application of rewards or reinforcements, to train pigeons and other animals. In addition, he used the general principles of behaviorism to develop theories about how best to teach children and how to create societies that were peaceful and productive (Skinner, 1957, 1968, 1972).

The behaviorists made substantial contributions to psychology by identifying the principles of learning. Although the behaviorists were incorrect in their beliefs that it was not possible to measure thoughts and feelings, their ideas provided new insights that helped further our understanding regarding the nature-nurture debate as well as the question of free will. The ideas of behaviorism are fundamental to psychology and have been developed to help us better understand the role of prior experiences in a variety of areas of psychology.

Social Learning Theory , or learning by watching others , was developed by Albert Bandura (1977). His theory calls our attention to the ways in which many of our actions are not learned through conditioning, as suggested by Skinner . Young children frequently learn behaviors through imitation. Especially when children do not know what else to do, they learn by modeling or copying the behavior of others.

Bandura (1986) suggests that there is interplay between the environment and the individual. We are not just the product of our surroundings, rather we influence our surroundings. There is interplay between our personality and the way we interpret events and how they influence us. This concept is called reciprocal determinism . An example of this might be the interplay between parents and children. Parents not only influence their child’s environment, perhaps intentionally through the use of reinforcement, etc., but children influence parents as well. Parents may respond differently with their first child than with their fourth. Perhaps they try to be the perfect parents with their firstborn, but by the time their last child comes along they have very different expectations, both of themselves and their child. Our environment creates us and we create our environment.

Other social influences: TV or not TV? Bandura, Ross and Ross (1963) began a series of studies to look at the impact of television on the behavior of children. Bandura began by conducting an experiment in which he showed children a film of a woman hitting an inflatable clown or “bobo” doll. Then the children were allowed in the room, where they found the doll and during their play they began to hit it. The children also demonstrated novel ways of being aggressive toward the doll that were not demonstrated by those children who did not see the aggressive model. Bandura’s research raised concerns about the impact of violence on young children. Since then, considerable research has been conducted on the impact of violent media on children’s aggression including playing video games.

Cognitive Theory: The cognitive theories focus on how our mental processes or cognitions change over time . Three important theories are Jean Piaget’s, Lev Vygotsky’s, and Information-processing.

Jean Piaget (1896-1980) was one of the most influential cognitive theorists in development. He was inspired to explore children’s ability to think and reason by watching his own children’s development. He was one of the first to recognize and map out the ways in which children’s intelligence differs from that of adults (Piaget, 1929). He became interested in this area when he was asked to test the IQ of children and began to notice that there was a pattern in their wrong answers. He believed that children’s intellectual skills change over time and that maturation, rather than training, brings about that change. Children of differing ages interpret the world differently. Piaget theorized that children progressed through four stages of cognitive development (see Table 1.4).

Table 1.4 Piaget's Stages of Cognitive Development

Piaget has been criticized for overemphasizing the role that physical maturation plays in cognitive development and in underestimating the role that culture and experience plays. Looking across cultures reveals considerable variation in what children are able to do at various ages. Research has shown considerable overlap among the four stages and that development is more continuous.

Lev Vygotsky (1896-1934) was a Russian psychologist who wrote in the early 1900s, but whose work was not discovered by researchers in the United States until the 1960s and became more widely known in the 1980s (Crain, 2005). His sociocultural theory emphasizes the importance of culture and interaction in the development of cognitive abilities . Vygotsky differed with Piaget in that he believed that a person not only has a set of abilities, but also a set of potential abilities that can be realized if given the proper guidance from others. Vygotsky developed theories on teaching that have been adopted by educators today.

Information Processing is not the work of a single theorist, but based on the ideas and research of several cognitive scientists studying how individuals perceive, analyze, manipulate, use, and remember information . This approach assumes that humans gradually improve in their processing skills; that is, cognitive development is continuous rather than stage-like. The more complex mental skills of adults are built from the primitive abilities of children. We are born with the ability to notice stimuli, store, and retrieve information. Brain maturation enables advancements in our information processing system. At the same time, interactions with the environment also aid in our development of more effective strategies for processing information.

Urie Bronfenbrenner (1917-2005) developed the Ecological Systems Theory , which provides a framework for understanding and studying the many influences on human development (Bronfenbrenner, 1979). Bronfenbrenner recognized that human interaction is influenced by larger social forces and that an understanding of these forces is essential for understanding an individual. The individual is impacted by several systems including:

• Microsystem includes the individual’s setting and those who have direct, significant contact with the person, such as parents or siblings . The input of those is modified by the cognitive and biological state of the individual as well. These influence the person’s actions, which in turn influence systems operating on him or her.
• Mesosystem includes the larger organizational structures, such as school, the family, or religion. These institutions impact the microsystems just described. The philosophy of the school system, daily routine, assessment methods, and other characteristics can affect the child’s self-image, growth, sense of accomplishment, and schedule thereby impacting the child, physically, cognitively, and emotionally.
• Exosystem includes the larger contexts of community . A community’s values, history, and economy can impact the organizational structures it houses. Mesosystems both influence and are influenced by the exosystem.
• Macrosystem includes the cultural elements, such as global economic conditions, war, technological trends, values, philosophies, and a society’s responses to the global community.
• Chronosystem is the historical context in which these experiences occur. This relates to the different generational time periods previously discussed, such as the baby boomers and millennials.

In sum, a child’s experiences are shaped by larger forces, such as the family, schools, religion, culture, and time period. Bronfenbrenner’s model helps us understand all of the different environments that impact each one of us simultaneously. Despite its comprehensiveness, Bronfenbrenner’s ecological system’s theory is not easy to use. Taking into consideration all the different influences makes it difficult to research and determine the impact of all the different variables (Dixon, 2003). Consequently, psychologists have not fully adopted this approach, although they recognize the importance of the ecology of the individual. Figure 1.9 is a model of Bronfenbrenner’s Ecological Systems Theory.

Figure 1.9. Bronfenbrenner’s Ecological Systems Theory

Supplemental Materials

• This article discusses the importance of critical reflection on the underlying assumptions of developmental psychology as a science.

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Theories of Human Development Essay

Development takes place gradually. The essay on this page discusses this phenomenon in greater detail. It expands upon theories of Piaget and Vygotsky. Read through this human development essay example to get a better grasp of the subject.

Introduction

Theory of motor development, piaget’s theory of development, vygotsky’s theory, comparing and contrasting the theories of piaget and vygotsky.

Human development is a very complex process and no single theory can be sufficient enough to explain these processes. This paper focuses on various theories that attempt to explain the development processes and factors that influence them. The study explores different theories of motor development, their pros and cons.

The paper also examines theories of cognitive development focusing on Piaget’s and Vygotsky’s theories of development. The two cognitive theories are compared and contrasted citing some of their impact on the provision and practice used in working with children in the early years. These theories demonstrate that human development is a gradual but progressive process that occurs in stages.

Human development varied and extremely complex process. Therefore, no single theory can manage to explain human development exhaustively as a result of this complexity. Each theory tries to explain a limited range of development and this is the reason why particular areas of development often have cutthroat theoretical views, each attempting to explain the same facet of development (Barnes 1995).

Theories of human development are an array of ideas that are based on scientific proofs and efforts to explain and predict individual behaviours and development. From this definition it is very clear that theories attempts to provide vivid explanation from a messy mass of information (Neaum 2010).

Theories of development are categorized into minor and major theories. Minor theories of development deals with specific area of development; on the other hand major theories are the category that attempts to explain wider area of development. Some of the major theories of development include motor development, Cognitive development, Social cognitive development, evolution and ethology, psychoanalytic theories and humanistic theory (Neaum 2010).

One of the major milestones in the development of infants is the achievement of various motor developments. The development of motor skills has a major impact on other facets of development. The ability of a child to act on the effects of his/her surrounding has significant implications on other aspects of development, and each and every accomplishment enhances the child’s level of independence. (Cohen 2002).

At birth a child has several well developed motor skills, which comprises of staring, suckling, grasping, breathing, crying-necessary for the infant’s survival. Nevertheless, the common impression of a new born baby is one of uncoordinated lack of ability and overall weakness. Movement of their body reveals weakness in the muscles and deficiency in coordination, and takes a number of weeks before the baby can lift their head in an appropriate posture.

The infant’s muscles at this time are not able to function well therefore the infant is not able to perform basic activities. By the end of infancy, about a year and a half, the toddler can perform all the basic activities through complex coordinated movements (Bremmer & Slater 2003; Cohen 2002).

A child develops various motor skills progressively with time. These skills are attained by a child within a considerable age bracket for example some children start moving with their hands by 5 months while others as late as 12 months. These features of development are well elaborated in the two theories of motor development: maturational theories and dynamic system theory (Bremmer & Slater 2003).

The pioneer of maturational theories is a psychologist by the name Arnold Gesell who studied motor activity of infants up to the age of nine (Thomas 2000). Gesell concluded that motor development takes place in two directions. The first direction is known as the cephalocaudal trend and begins from the upper part of the body to the lower parts.

He stated that movement starts from the head, to the arms and trunk, then finally to the legs. The subsequent direction is the proximodistal motor trend. This begins from the centre of the body outwards to the peripheral parts. In other words head, trunk and the pelvic girdle gain impulses before the limbs and their joints.

The above two direction of motor development, fronted Gesell to the opinion that maturation solely shapes the motor development. In other words development is directed by a maturational schedule specifically connected to the central nervous system and to the development of the muscles (Bremmer & Slater 2003: Thomas 2000).

Gesell’s hypothesis was first disapproved by Myrtle McGraw in 1945.McGraw conducted a research on identity twins and established that training accelerated motor development. Besides McGraw’s results there are other studies which suggest that a pure maturation theory does not hold water.

First, the fact that the development of motor skills exhibit gradual but progressive behaviour does not necessarily mean it is a genetic characteristic. This can be proven by professional skills which are acquired gradually from simple practice to a professional level, but there is no evidence to suggest any links to genetics. Maturational theory does not elaborate why disparity exists among individuals in attaining motor abilities (Thomas 2000).

The shortcomings of the maturational theories led to the development of dynamic systems theory. The dynamic system theory holds the opinion that infants develop skills in diverse ways. Dynamic system theory ties motor development to a vibrant and advanced interaction of three key factors- growth of the nervous system, body abilities, and environmental constraints and sustainability.

In spite of the criticism of the maturational theories, experts have demonstrated that motor skills are acquired both at early infancy age and throughout life. In addition, child’s participation plays an important role in the development of motor skills (Bremmer & Slater 2003).

According to Piaget, children shape their own development. Children’s’ behaviour and development are inspired mostly by internal factors than external factors (Cohen 2002). Piaget stated that children learn to adjust to their surrounding and because of the cognitive adaptations they gain the capacity to understand their environment.

Adaptation is common to all living things and children are not left out. Children continually build more advanced understandings of their environment (Broadhead 2010). Piaget’s theory describes children as intrinsically active, constantly interacting with the surrounding, in such a style as to mould their own development. Since children are viewed as the most vibrant agents in developing their own world, Piaget’s theory is usually known as constructivism theory (Broadhead 2010).

Piaget asserts that for a child to acclimatize to a particular surrounding, two important processes are necessary; assimilation and accommodation. Assimilation entails treating everything around as if they are familiar. For instance infants always put everything they are given in their mouth since the only activity the acquitted to is suckling. They also treat everybody they meet in the same manner (White 2002).

Accommodation on the other hand involves altering or changing of behaviour and thoughts to adjust to a new environment/situation. Similar situation applies when a child meets new people; she has to adjust her way of thinking to understand the new person. Accommodation and assimilation takes place at the infancy stage and the instances above shows how accommodation and assimilation can take place simultaneously (Saxton 2010).

The process of assimilation and accommodation remains intact throughout an individuals’ life and helps them to counter new challenges/ experiences they encounter in their life (Long 2000). These dual processes are also known as functional invariants because they remain constant throughout an individual’s life time. However, cognitive structures changes to enable the infant acclimatise to the new challenges a head. (Miller 1993).

Piaget categorized four stages of human development, each with distinctive characteristics. These stages are sensorimotor stage, Pre-operation stage, Concrete Operations stage, and the Formal Operations stage (Bremmer & Slater 2003). Sensorimotor stage occurs from delivery to about 2 years.

It is the most remarkable and dramatic stage of development. A child is transformed from a helpless new born baby to the thinking and knowing baby (cognitive individual). These changes occur due to infant’s actions on objects and people in its surrounding. As this stage approaches its end, a child now is capable of reasoning through thoughts as well as action (Bremmer & Slater 2003).

Pre-operational stage takes over from the sensorimotor period up to seven years. A child at this stage is capable of solving practical problems by use of tools intelligently and by support of the adult members.

The child is also capable of communicating and representing information and thoughts through symbols. These capabilities develop progressively but there are some outstanding constraints to a child’s thinking at this stage. Children at this stage are egocentric and have illogical way of thinking (Thomas 2000). Concrete operational stage occurs between seven to eleven years.

One of the main characteristic of this stage is centration. A child tends to focus more on one facet of a situation leaving out others. Last but not the least is the operational stage which occurs at eleven years. At this stage a child is capable of solving problems related to the physical world, but the only constraint here is to do with the sphere of potential. When a child gets to final stage of cognitive development these restrictions are eliminated (Bremmer & Slater 2003).

Lev Semenovich Vygotsky lived in the same era as Piaget. He was the first psychologist to acknowledge the importance of adults in children’s development (Daniels 1998). According to Vygotsky, the development of a child’s intellectual capabilities is shaped by a didactic/informative relationship with knowledgeable individuals (Thomas 2000).

One of the most intriguing aspects of Vygotsky’s work is the claim that higher mental capabilities are first met and used proficiently in social interactions, and only later on being assimilated and processed as a person thought processes. For example, children initially use language at a competently during social interactions; later on they internalize and rearrange it. (Daniels 1998).

Therefore, the main premise in Vygotsky’s theories is that social interaction plays a major part in the cognitive development (Johnston & Nahmad-Williams 2009). Vygotsky believed there was a gap between children’s knowledge and what the children could acquire from the surrounding. At every stage of human development the child possesses a specific threshold of information, a transitional optimum. After the transitional optimum is the zone of proximal development.

This zone contains problems and information that are very difficult for a child to understand or solve. This zone, can nevertheless, be examined and comprehended with the help of a knowledgeable peer or adult. The adults can direct a child since they have more grasp of the complex knowledge or way of thinking (Collins & Cook 2001).

All the above theories of development concurred that a child’s cognitive development occurred in stages (Thomas 2000). However, these stages were told apart by different styles of thinking. Piaget was the first to classify child reasoning and thinking at various stages of life. Piaget believed that children progressed through four characteristic stages explained above. He also speculated on adaptation, and development (Barnes 1995).

The adaptation theory also referred to as the constructivism theory entails three basic processes which play a major role in a child’s cognitive development. These processes are adaptation, accommodation, and symmetrical balance. Assimilation (adaptaion) entails the incorporation of fresh ideas into the already existing cognitive structure.

Accommodation on the other hand entails adjustment made to the mental structures to accommodate the incorporated ideas. Lastly, equilibrium entails finding the balance between self and the surrounding, between accommodation and assimilation. When a child experiences a novel idea, a state of imbalance arises until she is able to assimilate and accommodate the idea.

Assimilation and accommodation enables a child to form a cognitive structure also known as schema, and with each stage of development comes new ways of organizing knowledge with the attainment of new cognitive structure. Cognitive structures/ schemas help the child in understanding the world around. A child learns by assimilating new ideas or by integrating the already existing ones to generate bigger ideas (Saxton 2010; Thomas 2000).

In contrast to Piaget’s theory, Vygotsky mostly associated with the social constructivist theory made the following conclusions: Culture -which is a superior mental efficacy of an individual came as a result of social processes. Vygotsky also claimed that language- regarded as a human social and psychosomatic process is natured by cultural tools. Last but not the least, introduced a concept of Zone of Proximal Development (ZPD) which states that a child’s potential is restricted to a definite time limit (Thomas 2000).

Vygotsky believed that adults and children’s’ peers had the responsibility of imparting great knowledge and experience to the younger ones (Daniels 1998). This theory supports the discovery model of learning and thus recognise a teachers as the most important person in nurturing a child’ intellectual abilities.

According to Vygotsky, a child learns cultural elements and tools through socialization. These comprised of languages, set of laws, art, music among others. From Vygotsky’s point of view language is a pattern of figurative representation, which has been made ideal over generations and generations and enables a child to understand the surrounding. Language formed the main difference between the basic thinkers and the advanced thinkers (Neaum 2010; Slater & Bremner 2003; Thomas 2000).

According to Vygotsky’s theory, Zone of Proximal Development had to do with a child’s present and potential capabilities to carry out something. He classified the task of solving a problem as those that can be solved without help, those that requires help and those that can not be performed even with help. He believed the notion of Zone of Proximal Development suggested an improved shift in the direction of learning and enhanced understanding of the educational process (White 2002; Thomas 2000).

The idea of Zone of Proximal Development paved way for other new ideas such as scaffolding. Scaffolding encompasses all forms of aid that a child receives to improve his/her intellectual development. Scaffolding is synonymous to the scaffolding in the building and construction and is only used temporarily.

In other words, a child can be taught and helped in doing something and thereafter left alone to perform the task on his/her own. Vygotsky believed that the background of a child and the account of the child’s culture needed to be understood since it supersedes the cognitive structuring process described by Piaget’s theory (Long 2000; Thomas 2000).

Piaget believed that the order in which children experienced the various stages of development was universal, but recognized that the tempo at which each child went through these stages was flexible and relied upon other factors. These factors included maturity, surrounding, influence from the society among other factors.

Since different skills are required at each stage of development, Piaget believed that children should not be coerced into learning or gaining knowledge until the child was prepared cognitively. “On the other hand, Vygotsky believed that instruction came prior to development and that instruction guides the learner into the Zone of Proximal Development” (Long 2000; Thomas 2000; Cohen 2002).

To be noted is that Piaget and Vygotsky had a lot of divergent outlooks which incorporated Piaget’s proposal that changes in cognitive comes before the linguistic advancement, contrary to Vygotsky who believed that language provides a child with more liberty of thinking and results to additional cognitive growth (Cohen 2002).

Piaget had more faith in the development of thinking and that language was transferred from an individual to the society. Vygotsky on the other hand believed that individuals acquired language from the society (Thomas 2000).

According to Vygotsky, language moved from the societal domain to an individual level. Vygotsky believed that children begins by expressing their own discourse and then transform to the language of the society. This became internalized as the child grew to adulthood.

In contrast, Piaget asserted that egocentric speech was basically a complementary tool to a child’s actions and thus subsided as the child grew older. Even though the both disagreed on the purpose of egocentric speech, they both concurred on its significance to cognitive development (Neaum 2010).

Piaget and Vyygotsky believed the rapport between a person and the society as very important. However, Vygotsky believed that adults and peers were the one who had the greatest responsibility of imparting their great knowledge to the young generation.

Vygotsky never believed that a child could grow and develop individually with external environmental factors playing a major role in his/her cognitive development. He also believed that a child was not capable of developing without learning from other people within his or her surrounding (Cohen 2002)

Piaget upheld the opinion that children were naturally inquisitive about their individual abilities and their surrounding and that they improved their knowledge as a result of their biologically controlled cognitive changes. Piaget also believed that children were only capable of learning in each and every stage at a time and ignored the role played by a child’s activities on his/her thinking processes.

In contrary, Vygotsky stages of development were smooth and steady processes. He believed that child’s understanding was a matter of social interaction. For Vygotsky, culture and social facets played a major role in his theories than Piaget’s theories (Thomas 2000; Broadhead 2010).

Theories of human development are an array of ideas that are based on scientific proofs and efforts to explain and predict individual behaviours and development. Human development being a complex process has been explained by numerous theories; the most dominant theories of human development being the cognitive theories of Piaget and Vigotsky.

Vygotsky believed that an individual’s intellectual development continues infinitely, unlike Piaget who believed it ends after 15 years. There are certain factors that can interrupt constructivism theory supported by both Piaget and Vygotsky and these include brain disorders, autism and other special cases that can interrupt the stages of development.

All though Vygotsky and Piaget had certain differences, they contribute a lot to the theories of development. They both acknowledged the role played by the society and knowledgeable individuals in child’s development. The theory of motor development concurs with the other two theories in that human development takes place gradually and in stages.

Dynamic system theory of motor development acknowledges the influence of the environment besides the physiological factors in a child’s development. This is in line with both Piaget and Vygotsky. However, the maturational theories of motor development have numerous shortcomings. These include failure to recognize the role played by external factors in child development, individual difference in attaining motor skills among others.

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• Child Development: Humanism and Maslow’s Needs Hierarchy
• Jean Piaget’ and Lev Vygotsky’ Views on the Learning Process
• Piaget and Vygotsky's Theories
• Developmental Psychology Theories of Piaget and Vygotsky
• Jean Piaget and Lev Vygotsky: Theories Comparison
• Synthesizing and Comparing Vygotsky's and Piaget’s Theories
• Jean Piaget and Lev Vygotsky
• Lev Vygotsky Views on Constructivism
• Issues in Cognitive Development
• Vygotsky and Piaget: Scientific Concepts
• Three Theories of Personality
• Effect of Humanistic Theory on Individual Personalities
• The Lifespan Development Perspective
• American Psychological Association: Development of Professional Knowledge & Abilities
• Development Stages in Infant-Father Relationship

Human Development - Free Essay Examples And Topic Ideas

Human development encompasses the process of growth and maturation from infancy through adulthood. Essays might discuss theories of human development, stages of development, and the factors influencing physical, cognitive, and emotional development. Furthermore, discussions could extend to the societal and environmental factors contributing to human development, and the impact of policy on human development outcomes. We’ve gathered an extensive assortment of free essay samples on the topic of Human Development you can find at PapersOwl Website. You can use our samples for inspiration to write your own essay, research paper, or just to explore a new topic for yourself.

On the Relevance of Black Holes and Supermassive Black Holes to Human Development

It has been said that Einstein once dreamed that he himself was traveling with a photon--a single particle of light. He was attempting to imagine past the boundary of the then known physical theories. It was an endeavor that would eventually produce both General, and Special Relativity. These two theories provided mankind things like GPS technology, more efficient communication technologies (communication satellite coordination), and seemingly, an overall truer knowledge of reality. In fact, relativistic physics have birthed an unimaginable level […]

Nature Vs. Nurture: Unraveling the Threads of Human Development

Nature versus nurture has been a debate that involves human behavior, and determiners whether it has to do with the environment one is born in or something that was inherited. Nature is often known as the hormone-based behaviors, genetics, disposition, and traits that have been inherited. Some kids get blue eyes from their parents, being able to play instruments and have an atheistic talent often comes for genes or traits pasted down from family members. Nurture has to do with […]

Middle Childhood

Children go through middle childhood, this starts around age 6 and continues to age 11. This is often referred to as the ""school years"". Middle childhood children are very curious and love to explore the world around them. They are active listeners and absorb knowledge like sponges. This is a time when children develop foundational skills for building healthy social relationships and learn roles that will prepare them for adolescence and adulthood. They are learning the social foundations of forming […]

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Human Development in Different Perspectives Across the Life Span: Differences and Similarities between Childhood Versus Adulthood

Throughout this paper, we have explored approaches to human development from different perspectives across the life span, such as in adolescence, childhood, adulthood, and so on. This subject is primarily investigated in terms of mental functioning and social relationships by developmental psychology in this chapter. To understand better, we have studied the stages in human life as prenatal, infancy, early childhood, middle childhood, adolescence, early adulthood, middle adulthood, and late adulthood. Given that developmental research includes various methods, ethics hold […]

Bronfenbrenner’s Ecological Model: a Layered Approach to Human Development

Understanding human development is akin to piecing together a jigsaw puzzle; many factors interplay to shape who we are, from our individual genetic makeup to the broader cultural and societal influences. Urie Bronfenbrenner's ecological model, introduced in the latter half of the 20th century, offers an insightful framework to explore these multifaceted influences. This model takes us on a journey, from intimate personal interactions to expansive societal constructs, highlighting how each layer intricately impacts human growth and behavior. At the […]

Effects on Children in Long-Term Foster Care

Foster care is a temporary placement for children who have a home environment that has unsafe living conditions that affect the child's well-being because of abuse and neglect. Family preservation and the safety of the child is the primary goal for children placed in temporary foster care. When focusing on family preservation, child welfare agencies provide services such as parenting education for parents to acquire skills in how to resolve problems effectively and can assist parents in receiving welfare benefits […]

Integrative Writing Assignment Erikson Autobiography

Introduction   Erik Erikson was a theorist. He believed that there were stages of development, each housing their own ‘tasks’. He concluded that “Young children wrestle with issues of trust, then autonomy (independence), the initiative. School-age children strive for competence, feeling able and productive.” (Myers, 2014 p 519).   Stage 1: Trust versus Mistrust (Infancy to 1 year) This first stage of Erik Erikson’s Eight Stages of Life lasts from infancy to one year of age. The child is unfamiliar […]

Domains in the Growth Process of Children

Physical Domain There are four different domains present in the growth process of children. These include the physical, cognitive, language, and social-emotional domains. These five domains explain why children behave a certain way and react in other ways. The physical domain explains the various physical changes that are present during certain periods of growth for children. For example, it is easy to tell physical differences between a preschooler and a toddler. Preschooler's body growth is larger than that of a […]

How do Childhood Experience Affect One’s Life?

Today’s society is very different from societies in the past. Have these changes affected children’s mental health? Most of us don't remember our first two or three year of life, but our earliest experiences may stick with us for years, influencing us well into adulthood. The experiences we face in our childhood can determine our future. Trauma faced during childhood may influence the way in which we control our emotions, or even our social skills during adulthood. According to Maanvi […]

The Unfamiliar Childhood Disorder – Reactive Attachment Disorder

The purpose of this paper is that a study was conducted for the diagnosis of Reactive attachment dsorder (RAD). This study was assessed with using the Relationships Problem Questionnaire (RPQ) and Reactive Attachment Disorder – Checklist (RAD-C). Chronbach's alpha of was used to test inter-rater, reliability and test-retest reliability (Thrall, Hall, Golden, & Sheaffer, 2009). There were fifty-three parents and caregivers who participated in the study. The first group were composed of children and adolescents who had former diagnoses of […]

Understanding Autism Spectrum Disorder (ASD)

Autism Spectrum Disorder (ASD) is a cognitive disability that affects a person’s “communication, social, verbal, and motor skills” . The umbrella term of ASD created in 2013 by the American Psychiatric Association that covered 5 separate autism diagnosis and combined them into one umbrella term, the previous terms being Autistic Disorder, Rett syndrome, Asperger’s Disorder, Childhood disintegrative Disorder, and Pervasive Developmental Disorders. The word spectrum in the diagnosis refers to the fact that the disability does not manifest itself in […]

Effects of Divorce on Families

The most basic effects of separation on kids or young adults incorporate an effect on their psychological changes, proper social skills, scholarly accomplishments and even behavior impacts that can carry on over the span of adulthood. The most recognized effects that divorce has on kids present themselves in the way that children will begin to reprimand themselves for the separation, there is a sense of vulnerability in elements of life that were previously concrete, there are social issues that emerge, […]

Day Care Effects on Childhood Development

Nearly one quarter of children in the United States are placed into a daycare system by the time they are five years old. Unfortunately, many families in today’s expensive world cannot afford for one parent to stay at home with their children all day. Since young children cannot properly care for themselves independently, parents often seek secondary care from outside sources. This leads to young children being placed in organizations such as daycare centers, preschools, and nurseries. One of the […]

Early Childhood and the Effects of Abuse and Neglect

Child abuse, neglect, or maltreatment and even intimate partner violence are all considered to be factors with negative effects for children. Neglect or maltreatment leads to many forms of abuse. Some of these are domestic violence, sexual abuse, and emotional abuse. These could impact a child's overall health if not treated early. More so, if children are not treated with therapy at an early stage, serious mental health issues could develop when children become adolescents. It has been stated that […]

Effects of Marriage and Divorce on Children

Development during early childhood is very important. It shapes who a person is in their actions, values, and ideals for the rest of their life. Divorce can affect how a child develops cognitively. Due to the stress of conflict, potential lack of attention or loss of resources the child receives during divorce it can be detrimental to how a young child cognitively develops and can have impacts on their life in the moment, but also long-term consequences. The self-image of […]

Benefits of Early Childhood Education

“If school is about learning, and learning starts at birth, then the idea that we expect Kindergarteners to meet their first teachers at age five is all wrong (English, 2018)”. There is increasing research being facilitated on early education with specific emphasis on the overall benefits it has on children. The range of benefits discussed in recent research include academic achievement, behavior, educational progression and attainment, delinquency and crime, and labor market success, among other domains (RAND, 2005). While much […]

Effects of Puberty in Children and Adolescence

Ideally, puberty involves changes that individuals, explicitly children, undergo mentally, physically, and socially in variations such as anxiety issues as they adapt to the mature bodies (Viner,2017). Puberty stage differs depending on the reaction of the individual; some may experience new changes as early as seven years old while others may experience the changes in their late stages. Physicians widely recognize adolescence as a critical change that opens gateways altering the life course of an individual and may affect their […]

Pecularities of Foster Care System

Foster Care is a system in which a minor is being put into a group home, or private home of a state-certified caregiver, referred to as a "foster parent" or with a family member approved by the state. Instead of being safely returned with their families or moved quickly into adoptive homes many will be forced to remain or bounce around different foster homes or institutions for years. Frequent moves in and out of the homes of strangers can be […]

Child Abuse Means a Physical Maltreatment

Child abuse means a physical maltreatment or sexual molestation of a child. When a child is starting to experience abuse, they change. They suddenly don't show affect for a certain relative or they don't want to go over to that relative's house. They get an attitude or change their behavior. Most people just see this as they are growing up and rebelling. When children start making sexual remarks or start displaying sexual behaviors with other young children, those are signs […]

Education in the Foster Care

Youth in child care and grown-ups who some time ago were put into consideration have lopsidedly high rates of enthusiastic and conduct issue. Among the zones of concern has been the absence of exhaustive psychological wellness screening of all youngsters entering out-of-home consideration, the requirement for more careful distinguishing proof of youth with passionate and conduct issue, and deficient youth access to high caliber emotional well-being administrations. In view of the magnificent quality and extensiveness of these announcements, the Casey […]

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Foster care is a temporary living arrangement made by the state for a child. Children are often placed in foster care because either a child protective service department employee or a court appointed judge has deemed the home unfit for a child to stay at. Foster care not only affects the child's life now but it also creates a barrier for future opportunities. Children are often placed in foster care because of the risk of maltreatment, including neglect, physical and […]

Childhood Obesity and Adolesence

Childhood obesity can be prevented in many ways. Parents are the main ones with a say so on obesity. They allow their children to digest all kinds of bad foods. Parents should introduce on a daily basis different kinds of healthy foods. They should also promote is by showing children how healthy food are good for the body. You have some children that won’t eat healthy things because of the color and the way it looks. Obesity is one of […]

The Field of Early Childhood

A Mission Statement for the Field of Early Childhood The early childhoodfield consists of five sectors. ""The sectors are Head Start, Chid Care, Health and Well Being of Children and Families, Research and Academia in the Early Childhood Field and Public Early Childhood Education, Each sectors talks about the goals and accomplishment, history, contributors, history and current issues"" (Laureate Education). Summary of five sctors goals Head Start is a program that is funded by the federal government to serve children […]

Main Pecularities of Foster Care Homes

Foster care protects and takes care of children or teenagers who have been saved from their families following allegations of abuse and neglect or both. A foster care system is an arrangement where a minor is placed under a private home, group home or ward that has been certified by the government. The minors are taken care of by foster parents, and they are closely monitored by social service or government agencies (Geiger, 26). It is meant to provide a […]

The Cause and Effect of Childhood Physical Abuse in the Home

Abstract Sadness, fearfulness, loneliness, and depression are some result of some sort of abuse that a child experience. Physical abuse happens when people hurt a child and causing broken bones, burns, bruises, or cuts. Childhood abuse in the home is a central social problem. This is significant to me because people never knows what really happens to children behind closed doors. Childhood abuse can have long-term effects that continue in adulthood. The overall purpose of this study is to see […]

Importance of Foster Care Agencies

The foster care agency takes in about 250,000 kids every year. Having that many children entering the system increases the issues of finding the proper caregiver for a child. Just as these problems are created, many effects can develop for the child that can last short-term and possibly long-term. Luckily, there are many ways to help these obstacles. Foster care agencies may construct unfavorable situations due to the choice of caregivers and the overabundance of problems that are created in […]

NIH Principles of Substance Abuse Prevention for Early Childhood

Lifespan development focuses on changes that occur within a person from the beginning of their conception until their death. Lifespan development incorporates not only the physical changes one acquires throughout time, but also the cognitive, emotional, and social changes. Humans have the capability of constant change, especially when exposed to different incidents or environments that can influence their choices, but as time goes on this change can become harder to achieve. At least four stages of lifespan development are observed, […]

The Foster Care Independence Act

Operating from 1853-1929, the Orphan Train Movement transported around 250,000 children. The children on the bus consisted of those who had been abandoned, did not have a home, and whose parents were deceased. They were brought to Canada and the United States and were placed throughout to their new homes (DiPasquale, n.d.). The purpose of this movement was to get children that did not have a home and were poor off New York streets and to bring them to the […]

Teen Pregnancy

Abstract: Teen pregnancy is a growing issue. For one, in some cases, it has become normalized by society to not only engage in sexual acts at a younger age. Even though some individuals may receive scrutiny over their early pregnancy, on a grand scale, it isn’t scrutinized enough. What adds to the complacency over this situation is the fact that teenage pregnancy has tremendously declined from generations prior. With this, the general public feels as if it is not that […]

Children in Foster Care

Adoption is a person can legally take care of the child and raise it like it their own. Adoption wasn't as common as it is today. In prehistoric times, adoption was to help the adults more than the kids. In 1851 the first adoption law was passed in Massachusetts. In the mid- 1900s mostly all states passed the laws. The law was parents had to go through a process before their ability to adopt a kid. In this article it […]

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• Open access
• Published: 29 July 2021

The evolution of our understanding of human development over the last 10 years

• Ali H. Brivanlou   ORCID: orcid.org/0000-0002-1761-280X 1 &
• Norbert Gleicher   ORCID: orcid.org/0000-0002-0202-4167 2 , 3 , 4  

Nature Communications volume  12 , Article number:  4615 ( 2021 ) Cite this article

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• Developmental biology
• Embryogenesis

As it fulfills an irresistible need to understand our own origins, research on human development occupies a unique niche in scientific and medical research. In this Comment, we explore the progress in our understanding of human development over the past 10 years. The focus is on basic research, clinical applications, and ethical considerations.

What basic research has taught us about human development

Over the last decade, progress in understanding our own development was mostly driven by the emergence and combination of remarkable new technologies. New molecular biology tools such as single-cell RNA-sequencing (sc-RNA-seq) unveiled the earliest genetic signature of the three cell lineages of the human blastocyst and allowed for the discovery of human-specific signatures 1 , 2 , 3 . CRISPR/Cas9 genome editing has offered further access to in vitro functional studies in human blastocysts 4 . However, as we discuss below, an ethical line was crossed when a group claimed that genetically modified human embryos had been transferred, leading to births 5 when neither public opinion nor a consensus within the scientific community had been reached regarding whether crossing the germline in in vitro fertilization (IVF) was safe and ethically acceptable.

On the embryology side, the development of an in vitro attachment platform for human blastocysts offered a first glance into post-implantation events up to 12 days 1 , 3 , 5 , 6 . This paved the way for several important discoveries, including the observation that the human embryo can self-organize to generate embryonic and extraembryonic germ layers, yolk sac, and amniotic cavities in the absence of maternal influences 5 , 6 ; and the presence of a transient embryonic tissue of trophectodermal lineage, adjacent to the yolk sac, therefore named, yolk-sac trophectoderm ( ysTE ) 5 . The presence of these seemingly human-specific populations was independently confirmed by sc-RNA-seq 1 .

The marriage of stem cell biology with bioengineering gave birth to the field of synthetic embryology 7 , 8 , 9 , 10 , 11 , 12 , 13 . This technology uses human embryonic stem cells (hESCs) cultured on geometrically confined micropatterned substrates to generate 2D in vitro models of human conceptuses, such as models of the gastrula ( gastruloids ) 7 , 8 , 9 , 10 , 11 , 12 , 13 , or parts of the embryo, such as cerebroids and neuruloids 14 . Thousands of nearly identical self-organizing human embryonic structures allow for standardization and reproducibility, which cannot be achieved in standard organoid structures 15 . Cells within these structures can be tracked and quantified in real time with sub-cellular resolution, using sophisticated quantification code, including artificial intelligence 14 .

Human gastruloids induce formation of the primitive streak and have enabled the deciphering of the molecular network underlying gastrulation—the most crucial moment of our lives 7 , 8 , 9 , 10 , 11 , 12 , 13 . 3D models of human epiblasts can spontaneously break axial symmetry, thus providing an assay for the elucidation of molecular events underlying the emergence of antero–posterior polarity 11 , 16 . A highly homogenous population of self-organizing 3D models of amniotic ectoderm-like cells can be obtained by combining microfluidic and microculture approaches 17 .

Finally, the development of interspecies chimeras provided the most stringent in vivo validation of human embryo models 9 , 10 , 18 . Unimaginable in human models, inter-species chimeras have become the next best choice to test whether hESC behavior in self-organizing gastruloids , as observed on microchips, would also occur in an embryonic environment 10 , 18 , 19 . Human/bird chimeras generated from transplanting human gastruloids into early chick embryos in ovo unexpectedly proved more efficient than previous methods 9 , 19 . They allowed for the observation of an entire self-organizing embryonic axis in bird eggs 9 . As birds are closer to dinosaurs than to humans, this high rate of success with these chimeras further suggested that these early patterning events must be highly conserved.

Translational clinical applications that arose from basic research

The past 10 years bore witness to significant clinical progress in reproductive medicine, often translated from basic research. Successful human uterus transplantation and the subsequent birth of healthy offspring was, for example, only achieved after years of meticulous laboratory work in animals 10 . Significant improvements in cryopreservation technology for human eggs and ovarian tissue were also preceded by research in model systems 10 , 20 . Practical clinical applications have been developed for women in need of cancer treatment that are toxic to ovaries. In these cases, oocytes and/or ovarian tissue can be cryopreserved for later use in fertility treatments once the patient is cured of her cancer 21 . This ever-evolving technology has already proven to result in live births, and has also become an integral part of routine infertility treatments with IVF, giving rise to the brand-new concept of fertility extension through egg-freezing.

Diagnostic technologies to assess retrieved eggs and preimplantation-stage embryos in the IVF process have been disappointing. For example, tracking extended embryo culture to blastocyst-stage with time-lapse imaging failed to improve embryo selection 22 . That chromosomal-abnormal embryos increase with maternal (but not paternal) age has been interpreted to mean that chromosomal abnormalities were a principal cause for lower implantation chances and higher miscarriage risks among older women. This assumption led to the rapidly growing utilization of chromosomal testing of human embryos prior to embryo transfer in a procedure recently renamed preimplantation genetic testing for aneuploidy (PGT-A) 23 . The hypothesis behind PGT-A is to exclude chromosomal-abnormal embryos from the transfer, thereby improving implantation potentials of remaining euploid embryos.

Here too, clinical evidence was unable to confirm the hypothesis 24 . Moreover, basic research demonstrated a self-correction mechanism in mouse 25 and human embryos 26 , 27 , 28 , 29 that arose during embryogenesis that was cell lineage-specific to the embryonic cell lineage. In contrast, PGT-A biopsies are obtained from the extraembryonic-derived trophectoderm, rendering any diagnostic procedure at the blastocyst stage ineffective. In addition, mathematical modeling demonstrated that results from a single trophectoderm biopsy could not be extrapolated to the whole embryo 30 . Transfer of PGT-A “chromosomal-abnormal diagnosed embryos” has resulted in the births of over 400 chromosomal-normal offspring 20 , 21 .

In recent years, increasing attention has also been given to the quickly evolving understanding of how interdependent lifestyle and human fertility are 31 , 32 , 33 , including the influence of diet on the microbiome, as in many other areas of medicine.

The ethical significance of understanding human development

Whether in clinical medicine or in the research laboratory, human embryology has remained an ethical minefield, strongly influenced by socio-political and religious considerations. At the core of the controversy resides the special moral value of the human embryo, a subject that has come to the forefront again with the ascent of human embryonic stem cell research 34 . There is, however, little consensus as to how to answer a previously raised question: “ what is an embryo ?” 35 . The term pre-embryo, first introduced in 1986, was defined as the interval up to the appearance of the primitive streak, which marks biological individuation at ~14 days post-fertilization. This definition designated the period beyond 14 days as the time when a pre-embryo attains special moral status 36 , 37 . Paradoxically, the term pre-embryo has been replaced by the indiscriminate use of the term embryo, whether at preimplantation cleavage or blastocyst-stages or post-implantation before day 14. It was suggested that the distinction was important for ethical, moral, and biological relevance. The principal reason is simple: Until a pre-embryo becomes an embryo, there is no way of knowing whether implantation has taken place, whether a pregnancy is developing, whether there is a single pregnancy or twinning, or whether fertilization ended up in a benign (hydatidiform mole) or even in a malignant tumor (choriocarcinoma) 35 . Assigning advanced moral value to embryos at those early stages is, therefore, difficult to defend.

The past 10 years have witnessed innumerous ethical debates related to this subject, each with its own social, historical, and religious justifications, reflecting cultural diversities in human populations. Most are triggered by scientific breakthroughs. We summarize here the major ethical challenges preoccupying reproductive research and clinical practice.

We have already briefly referred to CRISPR/Cas9 genome editing. While the use of sc-RNA-seq to identify the molecular blueprint of human development has not elicited significant controversy, CRISPR/Cas9 genome editing of human embryos has been a topic of intense discussions and is currently permissible only in vitro 38 . An alleged attempt in China of implanting human genome-edited embryos into the uterus supposedly led to two births (one a twin birth). Though widely discussed in the media, neither attempt was published in the medical literature, and therefore cannot be verified 5 , 38 .

The ethical debates surrounding the 14-day rule, quiescent since the early IVF days, experienced a rebirth that was prompted by in vitro human embryo attachment studies and the emergence of synthetic human embryos. Within this context, we note that self-organizing embryo models are nothing more than cells in culture and are certainly not embryos. Regardless of scientific merits, in the U.S., the National Institutes of Health (NIH) currently prohibits the use of public funds for the study of synthetic embryos “for ethical reasons”. After being under an NIH moratorium for more than a year, research on chimeras is now, however, again permitted, though human/non-human primate chimeras remain prohibited.

These ongoing ethical debates mostly also mirror those surrounding the lack of U.S. federal funding for clinical IVF and related research, as well as hESCs-derived model embryos. In this context, the American Society for Reproductive Medicine (ASRM)’s Ethics in Embryo Research Task Force recently made an important statement: “ Scientific research using human embryos advances human health and provides vital insights into reproduction and disease ” 39 .

Provided certain guidelines and safeguards are followed, research with already existing embryos or embryos specifically produced for research should be ethically acceptable as a means of obtaining new knowledge that may benefit human health. ASRM also pointed out that scientists and society must understand which research questions necessitate the use of human embryos.

It is gratifying to acknowledge the history and vitality of ongoing debates, especially since they increasingly mimic decision-making processes in the medical field. These debates are meant to be based on cost-benefit and/or risk-benefit assessments. These debates will, unquestionably, continue and, indeed, considering that every intervention has consequences, must be decided based on careful considerations, including all relevant stakeholders and all parts of society.

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Acknowledgements

We like to thank Min Yang, Jean Marx Santel, Adam Souza, and Amir Brivanlou, for data gathering and critical reading of the manuscript, and constructive criticism.

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Brivanlou, A.H., Gleicher, N. The evolution of our understanding of human development over the last 10 years. Nat Commun 12 , 4615 (2021). https://doi.org/10.1038/s41467-021-24793-3

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Essay on Theories of Human Development

Human development invites the creations of various theories and perspectives that help understand people, their development, growth, and the physical, cognitive and psychosocial changes they experience throughout their lives. Human development is based on the principle that most things in life can only be achieved through age and experience, resulting in maturity and character development. Through scientific proof, various psychologists and scientists have developed theoretical frameworks that explain and predict individual behaviors and development. There are three significant approaches to human development; the psychosexual, psychosocial, and ecological approach

Freud’s psychosexual theory states that children’s development occurs in a series of stages related to erogenous zones. Freud suggested that parents play a critical role in managing their children’s sexual and aggressive drives during early childhood, fostering their proper development. This theory posits that human personality consists of three interworking components: the id, the ego, and the superego, which unify as children go through the five stages of psychosexual development. The id focuses on desires and impulses. The ego focuses on reasoning while the superego helps to apply morals and values from society. According to Jeffrey & Lene (2019), Freud named five stages of his theory and emphasized that the early stages were vital, and most of later development were determined by the age of 6.

Erikson’s psychosocial theory states that human beings have to resolve various crises to become successful and complete. Erikson proposed eight stages of human development. Each stage has two conflicting ideas that must be resolved for children to develop into successful and active members in their societies (Maryville University, n.d). The conflicting ideas have two possible resolutions, a healthy and an unhealthy one. Failure to resolve the conflicts will result in the feeling of inadequacy and incompleteness (Barbara & Newman, 2015). In addition, Erikson posits that significant changes occur throughout a person’s life span, based on psychological and social aspects.

Bronfenbrenner’s ecological theory states that a child develops within a complex system of relationships. They include the microsystem characterized by parent-child relationships; the mesosystem comprises the extended family, school, neighborhood; and the ecosystem, which comprises the general society and culture. Additionally, the macrosystem is characterized by socioeconomic status, poverty, ethnicity, and the chronosystem is characterized by shaping environmental aspects with life changes and sociohistorical circumstances. This theory is significant because it incorporates historical aspects as important influencers on human development (Jeffrey & Lene, 2019). Further, Bronfenbrenner posits that children and adolescents play pivotal roles in their development, not entirely dependent on external influences.

Erikson modified Freud’s psychosexual theory into an eight-stage theory of development. It means that Erikson’s theory is an advanced model of Freud’s theory. Freud’s theory is psychosexual, related to the psychological and sexuality aspects, while Erikson’s theory is psychosocial, which relates to the psychological and social aspects. Bronfenbrenner’s theory is ecological as it relates to environmental aspects. Further, Freud’s theory focuses on conscience, where a person learns the rights and wrongs through a person, a being, or a voice that gives moral lessons and advice. On the other hand,

Erikson’s theory focuses on autonomy, where people learn how to be independent and self-sufficient. Additionally, Freud’s theory suggests that the early childhood stages are the most essential in human development. At the same time, Erikson believes that every stage in a person’s life is vital in molding their life. Compared to Erikson and Freud’s theories, Bronfenbrenner’s theory does not focus on life stages. Instead, he emphasizes numerous influences that model humans in the social environment (Jeffrey & Lene, 2019). It is also important to note that the three theories play significant roles today in the study and planning of children and adolescent’s development.

In conclusion, human development is a broad, complex process with different scientists trying to develop the most appropriate and exclusive explanation. Human development theories provide various ideas developed from scientific proof to predict and learn individual developments and behaviors. Most people experience the stages highlighted by Freud and Erikson, while Bronfenbrenner’s environmental aspect relates to most people’s lives. Regardless of the difference in their explanations, the three theories explicitly outline human development as it is. Human beings go through several stages in their life, and every stage is significant in its way. Further, early childhood experiences play a significant role in shaping our adult life, and the people and things we engage with are significant determinants of our development.

Barbara, N. M., & Newman, P. R. (2015)  Theories of human development  Psychology Press.  https://doi.org/10.4324/9781315871240

Jeffrey Jensen Arnett & Lene Arnett Jensen, (2019) Human Development: A Cultural Approach Pearson ISBN.13: 978-0-134-64134-8

Maryville University (n.d) What is Human Development and Why is it Important?  Stages of Human Development: What It Is & Why It’s Important (maryville.edu)

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The Theories on Human Development

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Works Cited

• Berger, K. S. (2014). The Developing Person Through the Life Span. Worth Publishers.
• Essay UK. (2014). Sigmund Freud And Erik Erikson Theories Of Human Development. Retrieved from https://www.essay.uk.com/essays/psychology/sigmund-freud-and-erik-erikson-theories-of-human-development/
• Feist, J., & Feist, G. J. (2018). Theories of personality. McGraw-Hill Education.
• Friedman, S. L. (2018). Erik Erikson's psychosocial theory of development: Young adults' resolution of the intimacy versus isolation crisis. Journal of Adult Development, 25(2), 81-92.
• Hall, G. S. (1922). Senescence: The Last Half of Life. D. Appleton.
• Hoffman, L. (2017). A critical analysis of Piaget's theory of cognitive development. Human Development, 60(6), 327-341.
• Kline, P. (2019). Personality: The psychometric view. Routledge.
• Lerner, R. M. (2018). Handbook of child psychology and developmental science: Theory and method. John Wiley & Sons.
• Mcleod, S. (2018). Jean Piaget's theory of cognitive development. Simply Psychology. Retrieved from https://www.simplypsychology.org/piaget.html
• Stevens, R. (2018). Freud's psychosexual stages of development. Simply Psychology. Retrieved from https://www.simplypsychology.org/psychosexual.html

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Return Migration and Human Capital Flows

We bring to bear a novel dataset covering the employment history of about 450 million individuals from 180 countries to study return migration and the impact of skilled international migration on human capital stocks across countries. Return migration is a common phenomenon, with 38% of skilled migrants returning to their origin countries within 10 years. Return migration is significantly correlated with industry growth in the origin and destination countries, and is asymmetrically exposed to negative firm employment growth. Using an AKM-style model, we identify worker and country-firm fixed effects, as well as the returns to experience and education by location and current workplace. For workers in emerging economies, the returns to a year of experience in the United States are 59-204% higher than a year of experience in the origin country. Migrants to advanced economies are positively selected on ability relative to stayers, while within this migrant population, returnees exhibit lower ability. Simulations suggest that eliminating skilled international migration would have highly heterogeneous effects across countries, adjusting total (average) human capital stocks within a range of -60% to 40% (-3% to 4%).

We thank seminar participants at UC Berkeley Macro-Lunch, CKGSB, West Coast Trade Workshop 2024, NBER Labor Studies 2024 Spring Meeting, West Coast Spatial Workshop 2024, and Wharton Real Estate. We are particularly grateful to Gaurav Khanna, Mathilde Muñoz, Emi Nakamura, Andrés Rodríguez-Clare and Benjamin Schoefer. This work was supported by the Fisher Center for Real Estate and Urban Economics and the Clausen Center at UC Berkeley. All remaining errors are ours. The views expressed herein are those of the authors and do not necessarily reflect the views of the National Bureau of Economic Research.

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UNDP's pioneering Digital Development Index for Pakistan finds that districts performing better on digital transformation are also performing better on human development

April 24, 2024.

• The Pakistan National Human Development Report 2023/2024 on ‘Doing Digital for Development’ places Pakistan in the ‘moderate’ digital development category.
• Almost half of Pakistan’s districts have low digital development rankings. Islamabad is the country’s only district with ‘very high’ digital development; followed by Karachi, Lahore, Rawalpindi, Peshawar, Haripur, and Abbottabad achieving ‘high’ digital development.
• Digital development in Pakistan’s richest quintile is fifteen times greater than that in the poorest quintile, meaning that wealth is a huge marker of digital development.
• Women are underserved by digital development. A striking 83.5 per cent of women report that their spouse or parents dictate their phone ownership.

Islamabad, 23 April 2023: Pakistan’s first-ever Digital Development Index (DDI) measures digital development progress across Pakistan’s provinces and districts, placing the country in the ‘moderate’ digital development category with a cumulative DDI of 0.205, in the Pakistan National Human Development Report (NHDR) 2023/2024 ‘Doing Digital for Development: Access, Adopt, Anticipate, Accelerate’ launched here today.  

The Report shows a strong correlation between districts that perform better on digital transformation and those that have higher human development outcomes. For the first time in Pakistan, the NHDR 2023/2024 evaluates access to digital technologies in combination with other factors like digital usage, digital skills attainment, and transformative potential in the form of the DDI, which underscores how some districts have the highest transformative potential due to their high digital development.   

According to the global Human Development Report, Pakistan has a low Human Development Index rank of 164 out of 193 countries, coupled with a Gender Inequality Index position of 135 out of 166 countries. Digital divides further exacerbate poor development outcomes.

Federal Minister for Planning, Development & Special Initiatives, Ahsan Iqbal was the chief guest at the launch ceremony, which was also graced by visiting U.N. Assistant Secretary-General, UNDP Assistant Administrator and Regional Director Regional for Asia and the Pacific, Ms. Kanni Wignaraja. A large gathering of diplomats, dignitaries, policymakers, civil society, students, and other segments of society attended the event, which also featured an interactive exhibition of Pakistan’s digital evolution and journey since 1947.

Through exhaustive statistical analysis at national, provincial, and district levels, a nationally representative survey, and consultations conducted all over the country, the Pakistan NHDR 2023/2024 presents a dynamic digital transformation policy framework of 4 As – Access, Adopt, Anticipate, Accelerate – investments in which can become Pakistan’s fastest route to human development. 

“The Government of Pakistan is committed to harnessing the benefits of technological innovation to improve livelihood prospects, accelerate financial inclusion, improve employment, and deliver efficient public services,” stated Federal Minister Ahsan Iqbal in his keynote address at the launch ceremony.   

Earlier in her remarks, UNDP Regional Director for Asia and the Pacific, Ms. Kanni Wignaraja observed that just over 60 per cent of the population in Asia-Pacific is online, with women and marginalized groups significantly underrepresented. “Pakistan is the 6th largest contributor to the global middle-class growth between 2022 to 2030, contributing 25 million,” she said. “Targeted digital transformation efforts for this growing middle class could greatly improve the country's productivity.”    “By launching this Report, our ambition is to contribute to a future-oriented Pakistan where digital transformation becomes a hallmark of its inclusion, and a cornerstone for its prosperity,” said UNDP Pakistan Resident Representative, Dr. Samuel Rizk on the occasion.   

The Report highlights that 54.3 per cent of the country does not have access to the internet because of inadequate digital infrastructure and affordability challenges. Almost half of Pakistan’s districts have low DDI rankings. Without equitable access to digital technology, Pakistan’s human development outcomes will remain low and under-served. With 87.35 million internet users and significant mobile connectivity, Pakistan's digital transformation opportunity presents an avenue for leapfrogging development barriers.

Media contacts: For more information or to request an interview, contact:  In Islamabad: [email protected] +92 51 835 5679  

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How Can Teacher Preparation Stay Relevant?

Eleonora Villegas-Reimers and Meagan Comb explore the ways programs are adapting to today’s challenges

Finn gardiner.

Traditional teacher preparation programs housed in institutions of higher education are finding themselves having to adapt to the new reality that fewer people are studying to become teachers. As a result, these programs are building new partnerships, changing their curriculum, and adopting new recruitment methods to keep themselves relevant.

For this Conversations with the Dean session, Dean David Chard is joined by Meagan Comb , assistant dean of Executive Affairs and executive director of the Wheelock Educational Policy Center, and clinical professor Eleonora Villegas-Reimers , chair of the Teaching & Learning Department, to discuss the role that traditional teacher preparation plays in a continually changing landscape—and how higher education institutions can improve their methods to encourage a new generation of students to join the profession.

Highlights from the Conversation

The changing landscape of teacher prep.

There’s been a significant decline in teacher prep enrollment over the last decade. . . . It used to be that, in most states, to become a teacher, you had to complete a teacher prep program from an institution of higher education. [But because of the] shortages, alongside concerns and questions about the quality of training meeting the needs of the current classroom environment, new avenues began to open up. Meagan Comb

Keys to teacher retention

It’s fascinating to have conversations both with recent graduates who are choosing to stay, but also with teachers who have been in the field for 20, 25 years and are choosing to still stay. In talking with the younger teachers, how well prepared they feel has an impact on their decision to stay. They feel that they know what they are doing. They feel that they can do things even when they don’t feel totally supported by their administration, their district, or by the parents in their school. Eleonora Villegas-Reimers

The impact of contemporary research

When I became a teacher, we didn’t know about the impact of social and emotional learning. We didn’t know how the brain works to facilitate learning, and the conditions that we need to create so that learning can happen. . . . So now we have research that says, “You have an ethical responsibility to change the way you prepare teachers to respond to what we know about the way we can facilitate learning and teaching.” Eleonora Villegas-Reimers

Conversations with the Dean are a series of webinars hosted by Dean Chard that explore some of the most pressing topics in education. Learn more about Conversations with the Dean .

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