Jean Piaget was a Swiss psychologist, biologist, and philosopher.
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He known for his extensive work in the field of child development and cognitive psychology.
Piaget proposed that children progress through four stages of cognitive development
He believed that children actively construct their understanding of the world through interactions with their environment.
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Piaget passed away on September 16, 1980, in Geneva, Switzerland, leaving behind a lasting legacy in the field of child development and cognitive psychology.