Jean Piaget (1896-1980) always considered himself ... Piaget found four major developmental stages (with many subdivisions). For the first year and a half or two years of life, infants are only ...

It was originated by the Swiss developmental psychologist Jean Piaget (1896–1980). The theory deals with the nature of knowledge itself and how humans gradually come to acquire, construct, and use it.

Piaget's second stage on sale of cognitive development, Piaget s Stages 4 Stages of Cognitive Development Theory on sale ...

Being able to represent objects in their mind is another key part of the preoperational stage and, as a result, you might see them taking part in pretend play. Image caption, According to Piaget ...

Jean Piaget's ideas about child development continue to ... like adults but go through a series of qualitatively distinct stages throughout their development. He believed that a child is not ...