A surname from French. / Jean Piaget (1896–1980), Swiss developmental psychologist and philosopher.

Of or relating to Jean Piaget (1896–1980), Swiss developmental psychologist and philosopher known for his cognitive studies with children.

A proponent of Piaget's theories, esp. on children's cognitive development.

plural of neo-Piagetian

plural of Piagetian

Of or relating to various theories that build upon and criticize those of Jean Piaget.

A proponent of any of these theories.