Charles Darwin The grandfather of evolutionary psychology, which attempts to determine which psychological traits, such as personality and perception of attractiveness, are evolved adaptations due to natural selection.
Dorothea Dix An advocate for the mentally ill who revolutionarily reformed the way mentally ill patients are treated.
Sigmund Freud Founder for psychoanalysis and developed therapeutic techniques centered on talk therapy.
G. Stanley Hall First president for the APA, focused on scientific approaches, and he established a psychology lab in 1883.
William James His idea of psychology became known as functionalism and he published a two volume synthesis in the principles of psychology, 1890.
Ivan Pavlov Known for discovering classical conditioning by using the dog and bell experiment to measure the dogs saliva.
Carl Rogers Wrote 19 books on his humanistic theory and his best-know work is for client-centered therapy.
B.F. Skinner Best known for influence on behaviorism and his philosophy for radical behaviorism.
Margaret Floy Washburn Conducted extensive research on animal behavior and motor development.
John B. Watson Best known for his Little Albert experiment where he conditioned a child to be scared of a neutral stimulus.
Wilheim Wundt His greatest contribution was that he proved that psychology could be valid experimental science.