Piaget’s stages of development include sensorimotor, preoperational, concrete operational, and formal operational. While there is some criticism of them, they may help characterize child development.

Piaget’s stages of development describe how children learn as they grow up. There are four distinct stages: sensorimotor, preoperational, concrete operational, and formal operational. Jean Piaget was ...

The dominance of all-steel sport watches—particularly those designed by Gérald Genta, like the Patek Philippe Nautilus and Audemars Piguet Royal Oak—is fading among watch collectors. Men are ...

Jean Piaget (1896-1980) always considered himself a natural scientist, not a psychologist. As a boy he quickly gave up play and pretend to take refuge in "work" -- exploring internal combustion ...