This period, known as the formal operational stage, is the fourth and final stage of Jean Piaget's theory of cognitive development. It begins at approximately age 12 and lasts into adulthood.

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 ...

We spoke to lecturer in psychology and language researcher Dr Sam Durrant from LuCiD to help you make sense of cognitive development, the ideas that surround it, like Piaget's Theory, and some ...

This period is known as the concrete operational stage, which is the third stage in Piaget's theory of cognitive development. This period spans the time of middle childhood—it begins around age ...