8 Jean Piaget
- Full name: Jean William Fritz Piaget
- Born: 9 August 1896
- Died: 16 September 1980 (aged 84)
- Nationality: Swiss
- What Piaget was known for: Like Erikson, Piaget theorized that children developed in stages. Whereas Erikson’s stages focused on identity, however, Piaget studied children’s cognitive abilities. He was one of the first psychologists to acknowledge that children think differently than adults, which makes his work groundbreaking and important, even today.
It is with children that we have the best chance of studying the development of logical knowledge, mathematical knowledge, physical knowledge, and so forth. -Jean Piaget