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.

Cognitive science has shaped how we talk about learning, but can teachers assess what they can’t observe? Exploring a more practical alternative.

Adolescents who sleep for longer -- and from an earlier bedtime -- than their peers tend to have improved brain function and perform better at cognitive tests, researchers have shown. But the study of ...

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 ...