Human Development

Development is the pattern of progressive, orderly, and predictable changes that begin at conception and continue throughout life. It includes changes in the way we think, use language, form relationships, and also physical changes.

It is different from growth and maturation:

- Growth means an increase in the size of body parts or of the organism as a whole. It can be measured, such as height or weight.
- Maturation means changes that follow an orderly sequence and are largely guided by the genetic blueprint. For example, most children sit, stand, and walk at about the same ages.
- Development is wider than both. It includes growth, but also changes in proportion, features, abilities, emotions, and social behaviour across the whole life span.

So, growth is mainly quantitative, maturation is genetically guided orderly unfolding, and development is the total pattern of changes from conception to old age.

The life-span perspective on development has these main features:

1. Development is lifelong — it begins at conception and continues up to old age. It includes both gains and losses.
2. Biological, cognitive, and socio-emotional processes are interwoven throughout life.
3. Development is multidirectional — some abilities improve while others may decline.
4. Development is highly plastic — many abilities can be improved or modified across the life span.
5. Development is influenced by historical conditions — people born in different times have different experiences.
6. Development is studied by many disciplines such as psychology, anthropology, sociology, and neuroscience.
7. Development depends on context — heredity, physical environment, social, cultural, and historical conditions all affect it.

Thus, development is not limited to childhood; it continues across all ages and is shaped by many interacting forces.

Developmental tasks are the behaviours, skills, and accomplishments that are expected at a particular stage of development. They are social expectations of that stage, and a person is usually expected to achieve them before moving to the next stage.

Examples:
- In infancy, learning to sit, stand, and walk.
- In childhood, learning to read, write, reason logically, and develop friendships.
- In adolescence, forming an identity and developing a sexual identity.
- In adulthood, choosing an occupation, marrying, becoming a parent, and establishing a stable life structure.
- In old age, adjusting to retirement, widowhood, and reduced physical strength.

So, developmental tasks are stage-specific achievements that help a person progress through life.

The environment of the child has a major role in development because development does not take place in a vacuum. The child develops within a socio-cultural context, and environmental conditions can help or hinder growth.

Examples from the chapter:
- A child with a genotype for introversion may become somewhat more extroverted in an environment that encourages social interaction.
- A child with “short-height genes” cannot become taller than the limit set by heredity, even with good nutrition; this shows that the environment works within genetic limits.
- Parents influence the environment by providing books, activities, encouragement, and social experiences.
- Children who are cooperative and attentive often receive more pleasant responses from teachers and parents.
- Children may choose environments suited to their abilities, such as music or sports.
- Poor children living in overcrowded, noisy, unstimulating surroundings without books, toys, or good schooling may face learning difficulties.

Thus, the environment strongly influences development through family, school, peer group, neighbourhood, and broader social conditions.

Socio-cultural factors influence development because a child grows up in a particular social and cultural setting. These factors affect behaviour, values, learning, roles, and opportunities.

Examples from the chapter:
- In Bronfenbrenner’s view, the child is influenced by the microsystem like family, peers, teachers, and neighbourhood.
- The mesosystem includes relations among these settings, such as parents’ relation with teachers.
- The exosystem includes events the child does not directly participate in, such as a parent’s transfer, which can affect the child’s schooling or home life.
- The macrosystem includes the culture in which the child lives.
- The chronosystem includes life events and socio-historical changes, such as divorce or economic setback.
- Durganand Sinha’s ecological model shows the effect of home conditions, schooling, peer group, general geography, caste/class, and amenities like water, electricity, and entertainment.

Therefore, socio-cultural factors influence how children think, feel, learn, and behave, and they help shape differences in development.

The main cognitive changes in a developing child are explained in the chapter mainly through Piaget’s stages.

- In infancy (0–2 years), the child is in the sensorimotor stage. The child learns through senses and actions like looking, touching, mouthing, and grasping.
- A major achievement is object permanence — the understanding that objects continue to exist even when not seen.
- In early childhood (2–7 years), the child enters the preoperational stage. The child develops symbolic thought, but thinking is still limited.
- Features of this stage include:
- Egocentrism: the child sees the world only from his/her own point of view.
- Animism: the child thinks inanimate objects are alive.
- Centration: focusing on one feature of a situation and ignoring others.
- Intuitive thought: asking many “why” questions.
- In middle and late childhood (7–11 years), the child enters the concrete operational stage.
- The child can think logically about concrete objects and events.
- The child understands reversibility and conservation.
- Egocentrism declines.
- Thinking becomes more flexible and problem-solving improves.
- These growing cognitive abilities also support language development.

So, a child’s thinking changes from sensory-motor action to symbolic thought and then to logical thinking about concrete reality.