Psychological Development Across the Lifespan

Jean Piaget’s Theory of Cognitive Development

What does Piaget mean by an operation?

Piaget uses the term operation to refer to the ability to act upon an object in one’s mind. Piaget believed that knowledge came from action. The child acts upon the world and therefore learns via direct experience how the world functions. When Piaget spoke about operations, he meant that the child was able to perform mental actions on the world, or on objects within the world.


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