theory of cognitive development

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Jean Piaget

Jean Piaget (UK: /piˈæʒeɪ/, US: /ˌpiːəˈʒeɪ, pjɑːˈʒeɪ/, French:[ʒɑ̃ pjaʒɛ]; 9 August 1896 – 16 September 1980) was a Swiss psychologist…

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