The document discusses Jean Piaget's theory of cognitive development. It describes Piaget's background and outlines the four stages of cognitive development he proposed: sensory-motor stage, pre-operational stage, concrete operational stage, and formal operational stage. It also discusses the key concepts in Piaget's theory, including schemas, assimilation, accommodation, adaptation, and organization. According to Piaget, cognitive development occurs through interactions with the environment and progresses through these four distinct stages from infancy to adulthood.
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