What is Developmental Psychology?
- Developmental Psychology is the scientific study of how humans grow, change, and adapt from conception to death.
- Earlier focus: childhood only → now, due to increased life expectancy, focus is on entire life span.
- Emphasizes:
- Rapid change → infancy & adolescence
- Relative stability → adulthood
- Decline → old age
👉 Example: A baby learns to walk (rapid change), an adult maintains career (stability), and in old age memory may decline (decline).
Basic Terminologies
- Development: Continuous pattern of change starting from conception → growth + decline.
- Growth: Physical changes (height, weight, organ size).
- Life Span Development: Growth & change from conception to death (“womb to tomb”).
- Nature (Genes): Inherited traits (temperament, intelligence, physical features).
- Nurture (Environment): External influences (family, culture, education).
👉 Analogy: Think of a plant 🌱 → seed quality = nature, soil & water = nurture.
Dimensions of Development
Development happens across three processes:
- Biological (Physical):
- Physical growth, brain development, puberty, health changes.
- Example: Adolescents growing taller during puberty.
- Cognitive (Mental):
- Thinking, reasoning, intelligence, memory, problem-solving, language.
- Example: Child learning alphabets or solving puzzles.
- Socio-Emotional:
- Emotions, personality, relationships, social interactions.
- Example: Child showing anger if toy taken away, or teen building friendships.
👉 All three are interconnected. Example: A baby’s smile (social) depends on brain signals (biological) and recognition of mother (cognitive).
Nature of Development
- Lifelong: continues till death.
- Multidimensional: physical, mental, emotional.
- Multidirectional: some skills grow, others decline (e.g., wisdom ↑, memory ↓).
- Plasticity: change is possible at any age.
- Contextual: influenced by culture, family, society.
Periods of Development (8 Stages)
- Prenatal (Conception–Birth):
- Growth from single cell → full organism in 9 months.
- Brain, organs, and reflexes start developing.
- Infancy (0–2 yrs):
- Rapid growth, dependency on adults.
- Motor skills, language, basic social learning.
- Early Childhood (3–6 yrs):
- “Preschool years.”
- Learning self-care, imagination, play.
- Middle/Late Childhood (6–11 yrs):
- Elementary school years.
- Mastering reading, writing, arithmetic.
- Peer group importance ↑.
- Adolescence (12–19 yrs):
- Puberty, sexual maturity.
- Identity formation, independence, abstract thinking.
- Early Adulthood (20s–30s):
- Career building, relationships, family formation.
- Middle Adulthood (40s–60s):
- Responsibility, guiding children, career stability.
- Late Adulthood (60+ yrs):
- Retirement, reflection, adjustment to health decline.
👉 Analogy: Life = book 📖 → every stage = one chapter.
Nature vs Nurture Debate
- Nature: Heredity, genes, inborn qualities.
- Nurture: Environment, culture, education, life experiences.
- Modern view → interaction of both (biopsychosocial model).
👉 Example: A child with natural talent for music (nature) will only become a great musician if environment supports (training, exposure) = nurture.
Socio-Cultural Influences
- Culture: Shared traditions & values (e.g., Indian respect for elders).
- Race: Physical traits, genetic background.
- Ethnicity: Common language, religion, or nationality.
- Social Class: Wealth, poverty, or middle class → influences opportunities.
✅ Summary (Exam-Friendly):
Life span development is a lifelong, multidimensional process influenced by genes + environment. It includes biological, cognitive, and socio-emotional changes across 8 major life periods, shaped by culture, social class, race, and ethnicity.