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 ...

Jean Piaget's ideas about child development continue to influence pedagogical practices around the world. His pioneering work revolutionized our understanding of how children learn and think.

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 ...