Jean Piaget

Jean William Fritz Piaget (French: Jean William Fritz Piaget, August 9, 1896 - September 16, 1980) was a Swiss psychologist, educator, and philosopher who is famous for proposing the theory of cognitive development. Piaget received training in biology in his early years. He had already become interested in psychology while studying in college, and had dabbled in various schools of early development of psychology, such as pathological psychology, psychoanalysis, Jung's subconscious psychology and Freud's theory. Piaget was a professor of psychology at the University of Geneva from 1929 to 1975.