Development
Growth & Human Development
- Jean PiagetCognitive development — four stages (sensorimotor → formal operational); schema, assimilation, accommodation.
- Robert HavighurstDevelopmental tasks — tasks each life-stage must master.
- G. Stanley HallDescribed adolescence as a period of "storm and stress".
Learning
Theories of Learning
- Ivan PavlovClassical conditioning (UCS–CS–CR); the dog-salivation experiment.
- B. F. SkinnerOperant conditioning — learning by reinforcement (Skinner box).
- E. L. ThorndikeTrial & error / connectionism; laws of readiness, exercise, effect.
- Wolfgang KöhlerInsight learning (Gestalt) — the ape experiments.
- John DeweyConstructivism — "learning by doing"; project method.
Motivation
Motivation & Humanism
- Abraham MaslowHierarchy of needs; self-actualisation; humanistic psychology.
- Carl RogersSelf theory — real vs ideal self, unconditional positive regard.
- David McClellandAchievement motivation (n-Ach).
Intelligence
Intelligence & Its Measurement
- Binet & SimonFirst intelligence test; concept of mental age.
- Terman / SternIQ — Stern coined it, Terman gave IQ = MA/CA × 100 (Stanford–Binet).
- Charles SpearmanTwo-factor theory — general 'g' + specific 's'.
- L. L. ThurstoneGroup-factor theory — primary mental abilities (PMA).
- J. P. GuilfordStructure of Intellect (SOI); convergent & divergent thinking.
- Howard GardnerTheory of multiple intelligences (eight types).
- David WechslerWAIS — verbal + performance scales; deviation IQ.
Creativity
Creativity
- J. P. GuilfordDivergent thinking as the basis of creativity.
- Graham WallasFour stages of creative thinking — preparation, incubation, illumination, verification.
Personality
Personality & Assessment
- Sigmund FreudPsychoanalytic theory — id, ego, superego; the unconscious.
- W. H. SheldonType theory — somatotypes (endomorph, mesomorph, ectomorph).
- Carl JungPersonality types — introvert and extrovert.
- Gordon AllportTrait theory — cardinal, central, secondary traits.
- R. B. Cattell16 PF — source and surface traits.
- Hermann RorschachInk-blot projective test.
- Murray & MorganThematic Apperception Test (TAT).
Perception
Attention & Perception
- Gestalt schoolWertheimer, Koffka & Köhler — laws of perceptual organisation (figure-ground, proximity, closure…).