Human DevelopmentClass 11 Psychology Notes

Meaning of Development

Development is the pattern of progressive, orderly, and predictable changes that begin at conception and continue throughout a person's life. It's not just about getting bigger; it involves both growth and decline, such as the changes we see in old age. Development is a holistic process, meaning changes in one area of life affect all others.

Development is shaped by an interplay of three interwoven processes:

• Biological Processes: These are changes in the body due to the genes we inherit from our parents. This includes growth in height and weight, and the development of the brain, heart, and lungs.
• Cognitive Processes: These relate to mental activities like thinking, perceiving, paying attention, and solving problems. It's how we come to know and experience the world.
• Socio-emotional Processes: These involve changes in our interactions with other people, our emotions, and our personality.

Life-Span Perspective on Development

The study of development is not just about childhood. The Life-Span Perspective (LSP) views development through a set of key assumptions:

1. Development is lifelong: It starts at conception and continues until old age. It includes both gains (like learning a new skill) and losses (like a decline in physical speed).
2. Processes are interwoven: The biological, cognitive, and socio-emotional aspects of development are interconnected and influence each other throughout life.
3. Development is multi-directional: Some abilities may increase while others decrease. For example, as adults get older, their experience might make them wiser, but their speed on physical tasks like running is likely to decrease.
4. Development is highly plastic: People have the capacity for change. Skills and abilities can be improved or developed at any point in life, although the degree of this modifiability (plasticity) varies between individuals.
5. Development is influenced by historical conditions: The time and place in which you live shape your development. [!example] The experiences and career goals of a 20-year-old in India today are very different from those of a 20-year-old who lived through the freedom struggle.
6. Development is a concern of many disciplines: Fields like psychology, anthropology, sociology, and neuroscience all study human development to provide a complete picture.
7. Development occurs in context: An individual acts on and responds to their contexts, which include their inherited traits, physical environment, and social, historical, and cultural settings. Life events, both positive (winning an award) and negative (death of a parent), shape a person's life course.

Growth, Development, Maturation, and Evolution

These terms are related but have distinct meanings:

• Growth: Refers to a quantifiable increase in the size of body parts or the organism as a whole, such as height and weight.
• Development: A broader term for the process of growing and changing throughout life. These changes are directional and build on what came before. A temporary change, like from a brief illness, is not considered development.
• Maturation: Refers to changes that follow an orderly sequence and are largely dictated by our genetic blueprint. These processes "unfold from within" according to a genetically determined timetable. [!example] Most children can sit without support by 7 months and walk by one year. Special efforts to speed this up won't work if the infant is not maturationally ready.
• Evolution: Refers to species-specific changes passed down through generations. Natural selection is the evolutionary process that favors individuals or species best adapted to survive and reproduce.

Factors Influencing Development

The differences between people, as well as our shared similarities as humans, can be explained by the interaction of heredity and environment.

Heredity and Environment

We inherit genetic codes from our parents that provide a blueprint for our development.

• Genotype: This is a person's actual genetic material or genetic heritage.
• Phenotype: This is how the genotype is expressed in observable and measurable characteristics. Phenotypes include physical traits (height, eye color) and psychological characteristics (intelligence, personality).

The environment parents provide is also influenced by their own genetic predispositions. For instance, intelligent parents who are good readers are likely to provide their children with books, creating an environment that fosters reading skills. Furthermore, children themselves choose environments that match their genetic tendencies; a child who performs well in sports will likely seek out sports-related environments.

Context of Development

Development doesn't happen in a vacuum; it is always embedded in a particular socio-cultural context.

Bronfenbrenner's Contextual View of Development

Urie Bronfenbrenner emphasized the role of environmental factors, viewing them as a series of nested systems that influence an individual.

• Microsystem: The immediate environment where the individual lives and has direct interactions, such as with family, peers, and teachers.
• Mesosystem: The relationships between different parts of the microsystem. For example, the relationship between a child's parents and their teachers.
• Exosystem: Social settings where the child does not have an active role but that still influence their experiences. A parent's job transfer, for instance, can affect the child.
• Macrosystem: The broader culture in which the individual lives, including its values and beliefs.
• Chronosystem: The influence of life events and historical circumstances over time, such as a divorce or an economic downturn.

Sinha's Ecological Model

In the Indian context, Durganand Sinha proposed an ecological model with two layers:

1. The "upper and more visible layers": This includes the home (space, toys, technology), the school (quality, facilities), and peer groups.
2. The "surrounding layers": This more pervasive setting includes the general geographical environment (play spaces, population density), institutional settings (caste, class), and general amenities (drinking water, electricity).

These layers interact and influence a child's development. For example, children in impoverished environments often lack stimulation (books, toys, enriching experiences), have ineffective role models, and live in overcrowded surroundings, which can lead to difficulties in learning.

Overview of Developmental Stages

Human life proceeds through different stages, each characterized by a dominant feature. At each stage, individuals are expected to accomplish certain developmental tasks, which are skills and behaviors that society expects a person to master at that point in life.

Prenatal Stage

This period, from conception to birth, typically lasts about 40 weeks. Development during this stage is guided by a genetic blueprint but is also affected by maternal factors like age, nutrition, and emotional state.

A major threat to prenatal development comes from teratogens—environmental agents that cause abnormal development, serious abnormalities, or death.

• Common teratogens include: drugs (marijuana, heroin), alcohol, tobacco, infections (rubella, HIV), radiation (X-rays), and environmental pollutants (lead, mercury).

Infancy

The brain develops at an incredible rate before and after birth. While newborns have most of their brain cells, the neural connections among them develop rapidly.

Motor Development

A newborn's movements are governed by reflexes—automatic, built-in responses to stimuli that are essential for survival.

• Rooting reflex: Turning the head and opening the mouth when touched on the cheek.
• Moro reflex: Throwing arms outward and arching the back in response to a loud noise.
• Grasp reflex: Closing fingers around an object pressed against the palm.
• Babinski reflex: Fanning out and curling toes when the bottom of the foot is stroked. As the infant's brain matures, these reflexes disappear and are replaced by voluntary movements and finer motor skills like sitting, crawling, and walking.

Sensory Abilities

Newborns can:

• Hear immediately after birth and can tell which direction a sound is coming from.
• Distinguish their mother's voice from others'.
• See, though their vision is lower than an adult's. It improves to 20/20 by the first year. They are initially color deficient but develop full color vision by 3 months.
• Respond to touch, feel pain, and have developed senses of smell and taste.

Cognitive Development

According to Jean Piaget, children actively construct their understanding of the world. The first stage of his theory is the Sensorimotor Stage (0-2 years).

• In this stage, infants explore the world by coordinating sensory experiences with physical actions (looking, hearing, touching, grasping).
• A key limitation is the lack of object permanence—the awareness that objects continue to exist even when they cannot be seen. For a young infant, "out of sight is out of mind." This ability begins to develop around 8 months of age.

Socio-emotional Development

From birth, babies are social. They soon prefer familiar faces and respond to their parents.

• Attachment is the close emotional bond of affection that develops between infants and their caregivers.
• A classic study by Harlow and Harlow with baby monkeys showed that contact comfort (from a soft cloth "mother") was more important for attachment than nourishment (from a wire "mother" that provided food).
• According to Erik Erikson, the first year of life is the stage of developing trust or mistrust. Responsive, sensitive, and affectionate parenting builds a sense of trust, giving the infant a secure base from which to explore the world.

Childhood

During childhood, physical growth slows compared to infancy. The child's social world expands from parents to the wider family, school, and neighborhood.

Physical Development

Early physical development follows two principles:

1. Cephalocaudal trend: Development proceeds from the head region down to the tail region. Children gain control over their upper body before the lower part.
2. Proximodistal trend: Growth proceeds from the center of the body outward to the extremities. Children gain control of their torso before their arms and fingers.

Motor Development

• Gross motor skills, involving arms and legs, improve, allowing children to run and jump confidently.
• Fine motor skills, such as finger dexterity and eye-hand coordination, also improve, allowing for tasks like fitting jigsaw puzzles.

Cognitive Development

Piaget's theory outlines two stages during childhood:

1. Preoperational Stage (2-7 years):

   • Children develop symbolic thought, meaning they can use mental symbols (like drawings) to represent objects that aren't present.
   • Thinking is limited by egocentrism, where children see the world only from their own perspective and cannot appreciate others' points of view.
   • This leads to animism, the belief that inanimate objects are alive ("The road hurt me").
   • Thinking is also characterized by centration, the tendency to focus on only one feature of an object or event. [!example] A child might insist that a tall, narrow glass holds more juice than a short, wide one, even if the amounts are identical, because they are only focusing on the height.

2. Concrete Operational Stage (7-11 years):

   • Logical thought replaces intuitive thought. Children can perform operations, which are reversible mental actions.
   • They can now understand that rolling a ball of clay into a long strip doesn't change the amount of clay because they can mentally reverse the action.
   • This ability allows them to focus on multiple characteristics of an object, leading to a decline in egocentrism.
   • However, their thinking is still concrete; they cannot yet think about abstract ideas like algebraic equations.

Socio-emotional Development

• The Self: Children develop a sense of who they are. According to Erikson, this is the stage of initiative vs. guilt. When parents support a child's self-initiated activities (like playing and asking questions), the child develops a sense of initiative. If they are made to feel their actions are stupid or useless, they may develop guilt.
• Self-understanding shifts from physical descriptions ("I have black hair") to internal characteristics ("I am smart") and social comparison ("I can run faster than others").
• Gender and Sex Roles:
  • Sex refers to the biological dimension of being male or female, while gender refers to the social dimension.
  • Gender roles are sets of expectations about how males and females should think, act, and feel.
  • Children acquire a gender identity by about age 3. This is heavily influenced by parents, who often use rewards and punishments to encourage gender-appropriate behavior, as well as by peers and the media.
• Moral Development:
  • According to Lawrence Kohlberg, moral reasoning develops in stages.
  • Before age 9, children's morality is based on external authority; actions are "wrong" if they lead to punishment and "right" if they lead to rewards.
  • By early adolescence, they internalize the rules of others (parents, society) to win approval. At this stage, rules are seen as absolute and inflexible.

Challenges of Adolescence

Adolescence is the transitional period between childhood and adulthood, beginning with the onset of puberty (sexual maturity). It is a period of rapid biological and psychological change.

Physical Development

Puberty involves dramatic physical changes:

• Development of primary sex characteristics (related to reproduction) and secondary sex characteristics (signs of maturity like facial hair in boys or breast development in girls).
• A rapid growth spurt. For girls, this usually begins around age 10 or 11; for boys, around 12 or 13.
• An important developmental task is accepting one's maturing physical self.

Cognitive Developmental Changes

Adolescent thought becomes more abstract, logical, and idealistic. This corresponds to Piaget's Formal Operational Stage (11-15 years).

• Adolescents can engage in hypothetical-deductive reasoning, thinking systematically about possibilities to solve problems.
• This logical thinking allows for more flexible moral reasoning, where they may develop a personal moral code that can sometimes conflict with society's norms.
• Adolescent Egocentrism, described by David Elkind, has two components:
  • Imaginary audience: The belief that others are as preoccupied with them as they are with themselves, leading to extreme self-consciousness.
  • Personal fable: A sense of uniqueness that makes them feel no one understands them or their feelings. This often leads to statements like, "You don't understand me."

Forming an Identity

According to Erikson, the primary task of adolescence is to resolve the crisis of identity vs. identity confusion.

• Identity is the sense of who you are, including your values, commitments, and beliefs.
• Adolescents work to establish an identity separate from their parents. Those who fail to resolve this crisis may feel confused, isolate themselves, or lose their identity in the crowd.
• Identity formation is influenced by cultural background, family values, and peer relationships, which become extremely important during this time. Vocational commitment (deciding on a future career) is also a key factor.

Some Major Concerns

Adolescence can be a vulnerable period with unique challenges.

• Delinquency: Refers to behaviors ranging from socially unacceptable acts (truancy) to criminal offenses (stealing). It is often associated with a negative self-identity, low parental support, and family discord.
• Substance Abuse: Adolescents are vulnerable to smoking, alcohol, and drug use, often due to peer pressure, stress, or a desire to escape problems. Continued use can lead to physiological dependency and addiction.
• Eating Disorders: Obsession with body image can lead to serious conditions.
  • Anorexia nervosa: An eating disorder involving a relentless pursuit of thinness through starvation.
  • Bulimia: An eating disorder characterized by a binge-and-purge pattern of eating.

Adulthood and Old Age

Adulthood

An adult is generally seen as someone who is responsible, mature, and self-supporting.

• Early Adulthood: The major tasks are exploring possibilities for adult living and developing a stable life structure. This includes making choices about career and marriage.
• Career and Work: Earning a living and developing a career are central themes. Entering the workforce is a challenging event involving proving one's competence and handling new responsibilities.
• Marriage, Parenthood, and Family: Adjusting to marriage and becoming a parent are major life transitions that can be stressful but also provide unique opportunities for growth and satisfaction.
• Middle Adulthood: People notice gradual physical declines (vision, hearing) and changes in appearance (wrinkles, grey hair). Cognitively, long-term memory may show some decline, while wisdom may improve with age.

Old Age

The challenges of old age often include retirement, widowhood, illness, and death in the family.

• Retirement: Can be viewed negatively as a loss of self-esteem or positively as a shift in life with more time for personal interests.
• Family Changes: Older adults adjust to new roles like grand-parenting and may become more dependent on their children for support, which can sometimes trigger feelings of hopelessness.
• Dependency and Insecurity: Loss of energy, dwindling health, and financial assets can lead to feelings of insecurity. In many cultures, like India's, there is a strong expectation that children will care for their elderly parents.
• Death and Dying: Coping with death is a part of life. The death of a spouse is often the most difficult loss, leading to grief, loneliness, and depression. Support from family and friends is crucial during this time.