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30 mars 1920 - Participa en el perfeccionamiento de la Prueba de Inteligencia. Coeficiente Intelectual (C.I.), investigado por Stern.

Ajouté au bande de temps:

Jean Piaget

14 oct. 2018

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517

Date:

30 mars 1920

Maintenaint

~ Il y a 105 ans

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