1. John B. Watson: Did the Little Albert Experiment, which shoed that a child could be conditions to fear a previously neutral stimulus.
2. Carl Rogers: Originated the nondirective approach to psychotherapy, emphasizing a person-to-person relationship between the therapist and the client.
3. Dorothea Dix: Advocate for the mentally ill and revolutionarily reformed the way mentally ill patients are treated.
4. Maslow: Created the Hierarchy of needs.
5. Sigmund Freud: Was the founder of psychoanalysis. Developed techniques centered on talk therapy.
6. BF Skinner: Know for his work on operant conditioning and his accurate and replicable experiments.
7. Mary Calkins: Known for her studies in Self-Psychology.
8. Edward Thorndike: Studied how people learned to create more efficient teaching materials. Created Cat and the Box.
9. William James: Made James-Lange Theory of emotion.