Jean Piaget
Bio: Jean William Fritz Piaget (9 August 1896 – 16 September 1980) was a Swiss psychologist known for his work on child development. Piaget's theory of cognitive development and epistemological view are together called "genetic epistemology"
Born: Sun, Aug 09 1896
Death: Tue, Sep 16 1980
Death: Tue, Sep 16 1980
Jean Piaget is 84 years old