Jean Piaget

1896 - 1980 20th Century Swiss

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Biographical Core

Jean Piaget was a Swiss psychologist and philosopher renowned for his theory of cognitive development, which posits that children actively construct knowledge through interactions with their environment, progressing through four stages: sensorimotor, preoperational, concrete operational, and formal operational. Originally trained as a biologist, he began his pivotal work observing children's reasoning errors at the Alfred Binet Laboratory in Paris, emphasizing processes like assimilation and accommodation to explain how mental structures evolve from biological maturation and experience.

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