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American social psychologist, known for originating the theory of cognitive dissonance and social comparison theory. Advanced the use of laboratory experimentation in social psychology and emphasized studying real-life situations.
Austrian neurologist and the founder of psychoanalysis, a clinical method for evaluating and treating pathologies seen as originating from conflicts in the psyche.
Known for the person-centered approach and contributions to psychotherapy and counseling. Received the Award for Distinguished Professional Contributions to Psychology in 1972 and ranked as the sixth most eminent psychologist of the 20th century. Considered the most influential psychotherapist in history.
Psychologist known for creating Maslow's hierarchy of needs, a theory of psychological health. Emphasized the importance of focusing on positive qualities in people. Highly cited psychologist of the 20th century.
Psychologist with a PhD from the University of California, Berkeley. Former assistant professor at Harvard University and professor at the University of Michigan.