Revalidation of Conservation of Pre-Operational Stage of Piaget’s Cognitive Theory using Mental Characteristics in Mayo-Belwa Local Government Area, Adamawa State, Nigeria | Adamawa State University Journal of Scientific Research

Adamawa State University Journal of Scientific Research

Faculty of Science — Adamawa State University, Mubi

ISSN (Print): 2251-0702 ISSN (Online): 2705-1900

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Revalidation of Conservation of Pre-operational Stage of Piaget’s Cognitive Theory Using Mental Characteristics in Mayo-belwa Local Government Area, Adamawa State, Nigeria

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