Developmental Psychology: Theories of Human Development

Every major theory that has shaped our understanding of how humans grow, think, feel, and behave, explained clearly, compared critically, and illustrated with real examples.

What's Inside

Five landmark theoretical approaches, each unpacked in full with background context, core concepts, comparison tables, landmark studies, and honest critical evaluations.

Section 1 — Psychoanalytic Approach covers Freud's structural model, psychosexual stages, and defence mechanisms; Erikson's eight psychosocial stages across the full lifespan; Adler's individual psychology and birth order theory; and Horney's feminist critique of Freud. Every theorist is compared directly so you can answer exam questions with confidence.

Section 2 — Behavioural Approach walks you through Pavlov's classical conditioning step by step, Skinner's operant conditioning with all four reinforcement/punishment types and schedules explained clearly, and Bandura's Social Learning Theory including the Bobo Doll experiment, four processes of observational learning, and self-efficacy.

Section 3 — Cognitive Approach delivers a complete breakdown of Piaget's four stages with key limitations and achievements per stage, followed by Vygotsky's sociocultural theory — ZPD, scaffolding, private speech — with a direct head-to-head comparison of both theorists across six dimensions.

Section 4 — Ethological Approach covers critical versus sensitive periods with evidence, Lorenz's imprinting research, and Bowlby's full Attachment Theory including the four phases of attachment, Ainsworth's Strange Situation, all four attachment types, and long-term outcomes.

Section 5 — Ecological Approach gives you Bronfenbrenner's five nested systems (Microsystem through Chronosystem) and the revised PPCT Bioecological Model, complete with real-world examples and policy implications.

Built for students who need to understand theories deeply, compare them confidently, and apply them.