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05918_Field_MLPU T57.txt
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1996-04-10
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Jean Piaget (1896­1980) was the Swiss psychologist who identified
the four stages of mental growth in children. His work had a major
impact on both education and psychology. Piaget obtained his PhD in
biology at the age of 22, then studied psychology in Zurich and at the
Sorbonne in Paris, where he did research into cognitive abilities. In
1955 he was appointed director of the International Bureau of
Education.