| Clue |
Name |
| His best known works are The Interpretation of Dreams and The Psychopathology of Everyday Life. "free association" | Sigmund Freud |
| "analytic psychology," "collective unconscious" | Carl Jung |
| The Neurotic Constitution, "inferiority complexes" | Alfred Adler |
| conditioned reflex, Nobel Prize in 1904 | Ivan Pavlov |
| first prominent exponent of behaviorism, Behavior: An Introduction to Comparative Psychology | John B. Watson |
| one of the leading proponents of behaviorism in works like Walden II and Beyond Freedom and Dignity | B. F. Skinner |
| He is most famous for his theory of four stages of development: sensorimotor, preoperational, concrete operational, and formal operational. His most famous works are The Language and Thought of a Child and The Origins of Intelligence in Children. | Jean Piaget |
| "psychohistories" best known for his theories on how social institutions reflect the universal features of psychosocial development | Erik Erikson |
| Motivation and Personality and Toward a Psychology of Being, that introduced his theory of the "hierarchy of needs" (food, shelter, love, esteem, etc.) and its pinnacle, the need for "self-actualization." | Abraham Maslow |
| Though he did the work that created the idea of "six degrees of separation" and the "lost-letter" technique, he is mainly remembered for his experiments on "obedience to authority" | Stanley Milgram |
