Piaget's theory of cognitive development is a comprehensive theory about the nature and development of human intelligence. It was originated by the Swiss developmental psychologist Jean Piaget ...

The preoperational stage occurs between ages 2 and 7, where children engage in pretend play and symbolic thinking. During ...

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 ...

Your baby’s big enough to say “More!” when they want more cereal. They’re even able to follow simple instructions and throw their used napkin in the garbage. Yup, they’ve moved onto a new stage of ...