Human Development

This is the third chapter of NCERT's Class 11 Psychology textbook. It defines development, separates it from growth, maturation and evolution, explains how heredity and environment interact and how context (Bronfenbrenner; Durganand Sinha) shapes a child, and then follows the stages of life — prenatal, infancy, childhood, adolescence, adulthood and old age — with the theories of Piaget (thinking), Erikson (trust, initiative, identity), Kohlberg (moral reasoning) and Elkind (adolescent egocentrism). It has two boxes, Figure 3.1, three tables, five activities, ten review questions and two project ideas.

• Builds on What is Psychology? (developmental psychology as a branch; constructivism — Piaget and Vygotsky) and Methods of Enquiry (Piaget's case study of his three children; Harlow's experiment here is a model of an independent variable). Leads into Chapter 4 (the senses whose early form you meet here), Chapter 5 (learning — rewards and punishments in gender socialisation), Chapter 7 (thinking and language) and Chapter 8 (motivation and emotion).
• Pairs with live chapters: Class 11 sociology Culture and Socialisation (agencies of socialisation — family, peers, school, media) and Understanding Social Institutions (family and marriage); Class 7 Growing up as Boys and Girls (gender roles); Class 6 Family and Community; Class 12 sociology The Demographic Structure of the Indian Society (ageing and the dependency ratio) and Social Institutions: Continuity and Change (the changing family).
• UPSC: psychology has no paper of its own; this chapter's use is mainly GS4 Ethics, whose syllabus asks about the role of family, society and educational institutions in inculcating values — exactly what socialisation, attachment, Bronfenbrenner's systems and moral development (Kohlberg) explain. GS4 asked how family and surroundings shape attitudes (2016), set an Erik Erikson quotation (2021) and a quotation naming father, mother and teacher (2022), and gave a case of a bullied 11-year-old (2023). GS1 society asked about child cuddling, mobile phones and socialisation (2023); Essay topics on customary morality (2018), the hand that rocks the cradle (2021) and social media and youth (2024) draw on it. Ageing, adolescent health, drug abuse and euthanasia also feed GS1/GS2 answers.

• Development: progressive, orderly, predictable change from conception to death — growth and decline — through interwoven biological, cognitive, socio-emotional processes.
• Life-span perspective: lifelong, interwoven, multi-directional, plastic, historical, multi-disciplinary, contextual. Box 3.1 separates growth, development, maturation and evolution.
• Genotype → phenotype: genes set the limit, environment acts within it (Scarr, 1992). Context: Bronfenbrenner's five systems; Durganand Sinha's (1977) upper and surrounding layers.
• Infancy: reflexes (Table 3.1), object permanence, attachment — Harlow's cloth mother (contact comfort), Erikson's trust vs mistrust.
• Piaget: sensorimotor 0–2, preoperational 2–7 (egocentrism, animism, centration), concrete operational 7–11 (conservation), formal operational 11–15. Kohlberg: three age-related levels of moral reasoning.
• Adolescence: puberty, abstract thought, imaginary audience and personal fable (Elkind), identity vs confusion (Erikson); risks — delinquency, substance abuse, eating disorders. Adulthood and old age: work → family → health.

We usually notice physical change, but from conception to death we also change in how we think, use language and relate to others, and these changes happen in an integrated way. NCERT defines development as ‘the pattern of progressive, orderly, and predictable changes that begin at conception and continue throughout life’; it involves both growth and decline. Three processes interact: biological (genes from parents behind height, weight, brain, heart and lungs), cognitive (thought, perception, attention, problem solving) and socio-emotional (changing relations with others, emotions and personality — a child's hug, an adolescent's sorrow at losing a match). They are interwoven: the book studies them in separate chapters, but they shape the person as a whole.

Classmates differ in skin, hair and eye colour, height, temperament, intelligence and memory — yet none could be mistaken for another species. The answer, NCERT says, lies in the interaction of heredity and environment. We inherit genetic codes from our parents; it is the shared human code that makes a fertilised human egg grow into a human baby. Most characteristics come from combinations of many genes. A person's actual genetic heritage is the genotype; not all of it shows. The phenotype is how the genotype is expressed in observable, measurable traits — physical ones (height, weight, eye and skin colour) and many psychological ones (intelligence, creativity, personality) — and it results from the interaction of inheritance and environment.

Genes give a blueprint and a timetable, but development happens within an environment. A child genetically inclined to introversion, in a setting that encourages social interaction, may become a little extroverted; a person with ‘short’ height genes will not grow taller than average even with very good nutrition. Hence NCERT's rule: genes set the limit, and within that limit the environment influences development.

Sandra Scarr (1992) adds that parents provide both the genes and much of the environment, and the environment they provide partly reflects their own genes: intelligent parents who read well provide books, so their children tend to become keen readers. A child's own genotype — being cooperative and attentive — draws pleasanter responses from teachers and parents. And children choose settings that suit their genotype: a musically able child seeks music, an athlete seeks sport. These interactions change from infancy through adolescence; environmental influences, NCERT says, are as complex as the genes we inherit.

Transitions — entering school, becoming an adolescent, finding a job, marrying, having children, retiring — are joint products of biological change and changes in the environment, which can alter at any time. Urie Bronfenbrenner's contextual view (Figure 3.1) names five systems. The microsystem is the immediate setting where the child directly interacts with family, peers, teachers and neighbourhood. The mesosystem is the relations between these settings — how parents relate to teachers, or view the adolescent's friends. The exosystem is settings the child does not enter which still affect her: a parent's job transfer strains the parents, or the quality of local schools, libraries, medical care and entertainment. The macrosystem is the culture. The chronosystem is the timing of life events and the socio-historical circumstances — parents' divorce or economic setback and its effect on the child. Research cited by NCERT finds that children in impoverished environments — few books or toys, no visits to libraries, museums or zoos, ineffective role models, crowded and noisy homes — are at a disadvantage in learning.

Durganand Sinha (1977) proposed an ecological model for the Indian child in two concentric layers. The upper, more visible layer includes (i) the home — crowding, space for each member, toys, technological devices; (ii) the nature and quality of schooling and its facilities; and (iii) interactions and activities with peers from childhood. These are embedded in surrounding layers whose influence is pervasive but not always visible: (i) the general geographical environment — space for play outside the home, congestion, population density; (ii) the institutional setting provided by caste, class and other factors; and (iii) general amenities — drinking water, electricity, entertainment. The layers interact and can have different effects on different people, so a person must be understood in the context of her experiences.

Development is usually described in stages. Stages are assumed to be temporary and are marked by a dominant feature; in each, a person moves towards a goal that must be reached in the same order as others before moving on, though people vary in timing and rate. Some skills are learnt more easily at particular stages; these accomplishments become the social expectations of that stage — developmental tasks.

The prenatal period runs from conception to birth and typically lasts about 40 weeks. The genetic blueprint guides development, but both genetic and environmental factors matter. Maternal characteristics — age, nutrition and emotional state — affect the foetus, as do infections carried by the mother: NCERT names rubella (German measles), genital herpes and HIV. Teratogens are environmental agents that cause deviations from normal development, which can lead to serious abnormalities or death.

The brain develops at an amazing rate before and after birth; newborns have most but not all of their brain cells, and the connections among them grow rapidly. The newborn is not helpless: it breathes, sucks, swallows and excretes; within the first week it can tell which direction a sound comes from, distinguish its mother's voice, and imitate gestures such as tongue protrusion. Motor development begins with reflexes — automatic, built-in, genetically carried survival responses that are the building blocks of later movement. Some (coughing, blinking, yawning) last for life; others disappear as voluntary control develops. Motor skills — grasping, reaching, sitting, crawling, walking, running — follow a sequence that is universal, with minor exceptions.

Senses: newborns prefer some stimuli, such as faces; their vision is poorer than adults', improves by 6 months and is almost adult-level (20/20) by about one year. They may tell red from white but are generally colour-deficient; full colour vision develops by 3 months. They hear from birth and localise sounds better with age, respond to touch, feel pain, and can smell and taste. Cognition: Jean Piaget stressed that children actively construct their understanding; the infant (0–2 years) knows the world through looking, hearing, touching, mouthing and grasping and lives in the present — hide a toy and the young infant acts as if it no longer exists, lacking object permanence. By about 8 months the child starts pursuing an object partly covered in front of her. Babbling begins between 3 and 6 months.

Socio-emotional development: babies are social from birth — they prefer familiar faces and coo and gurgle at a parent. By 6–8 months, more mobile, they prefer the mother's company, show distress at strangers or separation and greet reunion with smiles or hugs. The close emotional bond between infant and caregivers is attachment. In a classic study by Harlow and Harlow (1962), baby monkeys separated from their mothers about 8 hours after birth were reared for 6 months with two surrogate ‘mothers’, one of wire and one of cloth; half were fed by each. Regardless of which fed them, the babies preferred and spent far more time with the cloth mother — feeding was not crucial for attachment; contact comfort was. A child's favourite blanket or toy offers comfort in the same way and is given up as the child grows surer.

Human babies attach to parents or caregivers who respond consistently and appropriately. According to Erik Erikson (1968), the first year is the stage of trust versus mistrust: physical comfort builds an expectation that the world is secure and good. Sensitive, affectionate, accepting parents give the infant a strong base to explore, and a secure attachment; insensitive, fault-finding parents can create self-doubt. Securely attached infants respond positively when picked up, move freely and play; insecurely attached infants are anxious at separation, cry from fear and get upset. A warm, interactive relationship with adults is, NCERT says, the child's first step towards healthy development.

Growth slows in early childhood compared with infancy. The child gains height and weight, walks, runs, jumps and plays with a ball; her social world widens from parents to family, nearby adults and school; she begins to grasp good and bad. Early development follows two principles: cephalocaudal — from the head to the tail, so the infant's head is proportionately large and a crawling infant uses arms before legs — and proximodistal — from the centre of the body to the extremities, so infants first reach by turning the whole body and only later extend an arm. These follow the maturing nervous system, not practice: visually impaired children show the same order. Children then grow slimmer as the trunk lengthens and body fat falls; the brain and head grow faster than any other part, supporting eye–hand coordination and writing; in middle and late childhood weight rises mainly through the skeleton, muscles and organs.

Gross motor skills (arms and legs, moving confidently) and fine motor skills (finger dexterity, eye–hand coordination) improve substantially in early childhood, and preference for the left or right hand develops.

The self: through socialisation the young child develops a sense of who she is and whom she wants to be identified with, and wants to do things her own way. According to Erikson, the way parents respond to self-initiated activity produces a sense of initiative or guilt: freedom to cycle, run and skate and answers to her questions support initiative; being told her questions are useless and her games stupid breeds guilt that may last into later life. Self-description moves from physical traits in early childhood (‘I am tall’, ‘I am a girl’) to internal and social ones in middle and late childhood (‘I am smart and popular’; member of the school music club), and to social comparison (‘I got more marks than Atul’). Once at school, children spend more time with peers, who increasingly shape their development.

Piaget held that a child's mind passes through a series of stages, each a distinct, age-related way of thinking; what makes a stage more advanced is the kind of thinking, not the amount of information.

Preoperational thought (early childhood). Having grasped object permanence, the child can use mental symbols — she draws people, trees and houses — but cannot yet do mentally what she did physically. Its marks: egocentrism (seeing the world only from her own point of view), which leads to animism (‘the road hurt me’); between about 4 and 7, endless ‘why’ questions — Piaget's stage of intuitive thought; and centration, focusing on a single feature — insisting on the ‘big’ tall narrow glass of juice over a short broad one holding the same amount.

Concrete operational thought (about 7 to 11, middle and late childhood). Intuitive thought gives way to logic built of operations — mental actions that are reversible. Roll one of two identical clay balls into a long strip and a 7- or 8-year-old says both hold the same clay, because she can imagine rolling it back; a preoperational child fixes on length or height. Attending to several features at once weakens egocentrism; thinking becomes flexible and steps can be retraced. But the child still cannot think abstractly — manipulating ideas without objects, as in algebra or imagining lines of latitude and longitude.

Formal operational thought (Piaget: between 11 and 15) is taken up in section 9: thinking becomes abstract, idealistic and systematic — hypothetical-deductive reasoning.

Moral development is learning to tell right from wrong, to feel guilt, to put oneself in another's position, and to help others in trouble. According to Lawrence Kohlberg, children pass through age-related stages of moral development as they do through cognitive stages. Kohlberg interviewed children with stories in which characters faced moral dilemmas, asking what the character should do and why. Before about 9 years, the child reasons in terms of external authority: an act is wrong because it is punished, right because it is rewarded. By early adolescence, the rules of others — parents, society's laws — are accepted as one's own, internalised to be virtuous and win approval (not to avoid punishment); rules are absolute and moral thinking is inflexible. Gradually a personal moral code develops. NCERT's summary: moral reasoning progresses through three levels, related to age and determined by cognitive development.

Adolescence (Latin adolescere, ‘to grow into maturity’) is the transition from childhood to adulthood, commonly defined as beginning at puberty, when sexual maturity — the ability to reproduce — is attained. Its physical changes are universal, but its social and psychological meaning depends on culture: where it is seen as confusing, adolescents' experience differs from where it is seen as the start of responsible adult life. Most societies have at least a brief adolescence, but NCERT says it is not universal across cultures.

Physical development: puberty is gradual, not sudden. Hormones bring primary sex characteristics (directly related to reproduction) and secondary ones (signs of sexual maturity). Boys show faster growth, facial hair and voice change; in girls rapid height gain usually begins about two years before menarche. The growth spurt generally begins at 12 or 13 for boys and 10 or 11 for girls. Timing varies — of two same-age boys one may finish before the other begins — through genes and environment: identical twins reach menarche closer in time than fraternal twins; girls from affluent families reach it earlier than those from poor families; and the age of menarche has been falling in industrialised nations with better nutrition and medical care. Interest in sexuality rises; parents find it hard to discuss, adolescents become secretive, and misconceptions persist — a concern sharpened by AIDS and other sexually transmitted diseases. Forming a sexual identity and accepting one's physical self are developmental tasks.

Cognitive change: thought becomes more abstract, logical and idealistic; adolescents examine their own and others' thoughts, and what others think of them. Piaget's formal operational thought appears between 11 and 15: reasoning goes beyond concrete experience; adolescents compare themselves and their parents with ideal standards; trial and error gives way to systematic problem solving — Piaget's hypothetical-deductive reasoning. Moral thinking turns flexible: should I smoke because everyone does? is it ethical to copy in an exam? An adolescent may join a protest march for a cause rather than conform to college norms.

Adolescent egocentrism, according to David Elkind, has two parts. The imaginary audience is the belief that others are as preoccupied with you as you are — everyone will notice the ink spot or the pimple — making adolescents intensely self-conscious. The personal fable is a sense of uniqueness — no one can understand my hurt; ‘you don't understand me’ — sometimes woven into fantasy and kept in diaries.

Identity — who you are, your values, commitments and beliefs — is, NCERT says, the primary task of adolescence: an identity separate from the parents, through a detachment that builds one's own beliefs. The search can bring conflict with parents and within oneself. Those who cope develop a new sense of self; those who cannot experience what Erikson called identity confusion — isolating themselves from peers and family, or losing themselves in the crowd. Adolescents swing between wanting independence and fearing it, between self-confidence and insecurity. Identity is shaped by cultural background, family and societal values, ethnic background and socio-economic status; family becomes less central as peers grow in importance — though parents and peers usually serve complementary needs — and by vocational commitment: some cultures let the young choose an occupation, others expect parents' decisions to be accepted; career counselling in schools helps.

Some major concerns. Looking back, adults recall adolescence as vulnerable — conflicts, uncertainty, loneliness, group pressure — though it also brings excitement, joy and competence as challenges are met. Peer pressure can be positive or negative; decisions about smoking, drugs, alcohol and breaking parental rules are often taken without thought for their effects.

• Delinquency — from socially unacceptable behaviour to legal offences and crime: truancy, running away, stealing or burglary, vandalism. Associated with a negative self-identity, low trust and low achievement; with low parental support, inappropriate discipline and family discord; and, in communities marked by poverty, unemployment and alienation from the middle class, with antisocial acts to gain attention and peer popularity. Most delinquent children do not remain delinquent.
• Substance abuse — smoking, alcohol and drugs, sometimes as a way of coping with stress, which interferes with learning coping skills and responsible decisions. Reasons: peer pressure and the need for acceptance, wanting to act adult, escaping pressure; nicotine's addictive power makes stopping hard. More vulnerable adolescents are impulsive, aggressive, anxious, depressive and unpredictable, with low self-esteem and low expectations. Long use leads to physiological dependency. Positive relationships with parents, peers, siblings and adults help prevent it. NCERT cites the Society for Theatre in Education Programme, New Delhi, whose street performances teach people aged 13 to 25 to say no to drugs; the UN International Drug Control Programme (UNDCP) chose it as a model for other NGOs in the region.
• Eating disorders — self-obsession, fantasy and peer comparison can lead to anorexia nervosa (relentless pursuit of thinness through starvation, encouraged by media images of thinness) and bulimia (binge eating, then purging by self-induced vomiting or laxatives, sometimes alternating with fasting). NCERT says both are primarily female disorders, more common in urban families.

An adult is generally someone responsible, mature, self-supporting and well integrated into society; when people take on adult roles varies — some work while studying, some marry and stop studying, some live with parents after marriage and financial independence. The timing of marriage, work and children differs between cultures but is similar within one. Early adulthood has two major tasks: exploring possibilities for adult life and building a stable life structure; the twenties are a novice phase, moving from dependence to independence. Career and work dominate the twenties and thirties — adjusting, proving competence, competing, meeting one's own and employers' expectations. Marriage means knowing the partner and coping with each other's tastes; if both work, sharing roles at home. Parenthood can be a stressful transition, shaped by the number of children, social support and the couple's happiness. Death of a spouse or divorce creates single-parent families; more women working outside the home creates dual-earner families, whose stresses NCERT likens to those of a single working parent. Yet parenting offers growth and a way of guiding the next generation.

In middle age, maturational changes bring gradual decline in vision, sensitivity to glare, hearing and appearance (wrinkles, grey or thinning hair, weight gain). Some cognitive abilities decline and others do not: memory declines more in long-term than short-term tasks — a phone number is remembered just after hearing it, not days later — while wisdom may improve, though not every adult becomes wise.

Old age has no fixed starting point; it was linked to retirement, but as people live longer the cut-off is moving upward. Challenges include retirement, widowhood, illness and death in the family, but the image is changing: many people past seventy are active, energetic and creative in politics, literature, business, art and science, and the myth of old age as incapacitating is fading. Experience depends on socio-economic conditions, health care, attitudes, social expectations and support. Work matters most in early adulthood, then family, then health. Retirement is seen by some as losing a source of satisfaction and self-esteem, by others as time for their own interests; older adults who are open to experience and achievement-oriented keep busy and adjust better. Older adults learn new roles (grandparenting) as children set up independent homes; dependence on children for money and company can bring hopelessness and depression in some. Loss of energy, health and finances brings insecurity and dependency; NCERT notes that Indian culture favours dependency of the elderly on their children, and that parents in most oriental cultures raise children hoping they will care for them in old age; the elderly need security and belonging.

Death is more likely in late adulthood but can come at any point; deaths of children and young adults, usually from accidents, seem more tragic, while in older adults death more often follows chronic disease. The death of a spouse is usually the most difficult loss, bringing grief, loneliness, depression, financial loss and health risks. Widows far outnumber widowers because women live longer and tend to marry older men; support from children, grandchildren and friends helps. Cultures view death differently: NCERT notes that in Gond culture in India death is believed to be caused by magic and demons, and in the Tanala culture of Madagascar by natural forces.

The chapter has five activities, two in-text question sets and two project ideas. Short outlines follow.

The ten review questions at the end of the chapter (page 59). Try each first, then open the outline.

Numbers

One-liners

• Development is progressive, orderly and predictable change from conception to death — including decline.
• Biological, cognitive and socio-emotional processes are interwoven.
• Growth is measurable increase in size; maturation unfolds on a genetic timetable.
• Genes set the limit; within it, environment influences development.
• Genotype is the inherited material; phenotype is how it shows.
• Bronfenbrenner: micro-, meso-, exo-, macro- and chronosystems.
• Teratogens are environmental agents that harm the unborn child.
• Harlow: contact comfort, not feeding, builds attachment.
• Piaget's stages differ in the kind of thinking, not the amount of information.
• Concrete operations are reversible mental actions on real objects.
• The primary task of adolescence is an identity separate from the parents.
• Work matters most in early adulthood, then family, then health.

Traps to avoid

• Development includes decline; growth is only one part of it.
• Object permanence develops in the sensorimotor stage — Table 3.2's preoperational placement means it is secure by then.
• Cephalocaudal is head to tail; proximodistal is centre to extremities.
• Mesosystem is the relation between settings; exosystem is a setting the child is not in.
• Sinha's caste and class sit in the surrounding layer, not the upper one.
• Rubella and HIV cause congenital damage, not genetic change — NCERT's wording is loose.
• Erikson's first stage is trust vs mistrust; attachment theory is Bowlby's.
• Animism comes from egocentrism; centration explains failure to conserve.
• Imaginary audience is ‘everyone is watching’; personal fable is ‘no one understands me’.
• Girls' growth spurt starts about two years before boys'.
• NCERT's 80,000 genes and 50,000-year-old Homo sapiens are outdated figures.
• Long-term memory declines more than short-term in middle age; wisdom may grow.
• Gender is social, sex biological; gender identity by about 3 years.

Prelims — what UPSC asks

• No Prelims question in the archive tests this chapter directly. Its Prelims value is vocabulary that recurs in science and social-sector statements — teratogens and the measles–rubella vaccine, anaemia and nutrition among adolescent girls, the ageing population, juvenile justice ages. Euthanasia questions (1996, 2006) asked which country or territory legalised it first — facts this chapter does not teach; read Activity 3.4's Indian case law instead.

Mains — where it appears and how to answer

• GS4 Ethics — family, society and values: 2016 (attitudes shaped unconsciously by family and surroundings — how to change undesirable ones), 2022 (Kalam: father, mother and teacher as makers of a corruption-free nation) and the 2023 case of a bullied 11-year-old use this chapter's frame: attachment and trust, Bronfenbrenner's microsystem and mesosystem (home–school links), social comparison and peers, gender socialisation, and Kohlberg's movement from reward and punishment to internalised rules to a personal code.
• GS4 quotations: the 2021 Erik Erikson quotation on interdependence — open with Erikson's psychosocial stages (trust in infancy; intimacy and generativity in adulthood are Beyond NCERT) and attachment research, then move to administration (teamwork, inter-departmental trust).
• GS1 Society: 2023 ‘Child cuddling is now being replaced by mobile phones’ — Harlow's contact comfort, secure attachment and sensitive parenting, Bronfenbrenner's microsystem; pair with the sociology chapter on socialisation. Adolescent health, delinquency (Juvenile Justice Act), substance abuse and ageing are standard GS1/GS2 themes this chapter grounds.
• Essay: ‘Customary morality cannot be a guide to modern life’ (2018) — Kohlberg's conventional and postconventional levels with Gilligan's and cultural critiques side by side; ‘Hand that rocks the cradle rules the world’ (2021) — attachment, early socialisation, the trust-versus-mistrust stage; ‘Social media is triggering Fear of Missing Out amongst the youth’ (2024) — the imaginary audience, the adolescent's need for peer acceptance, identity confusion. The 2023 essay on girls' restrictions and boys' demands is the clearest use of Box 3.2 (dependence and independence training), and is linked to the gender chapters.
• Answer frame: name the stage → the theorist's concept (attributed, with NCERT's date) → an Indian example → the contested view in one line → a policy or administrative implication.

Tap an option. NCERT's own exercise questions come first; the rest test the figures and common confusions.

Open any question to attempt it in the Question bank — your attempt is saved to your progress.