The Significance and Potential of Piaget's Developmental Stage Theory

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  • Nakagaki Akira
    Faculty of Education and Integrated Arts and Sciences, Waseda University

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  • ピアジェ発達段階論の意義と射程
  • ピアジェ ハッタツ ダンカイロン ノ イギ ト シャテイ

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The purpose of this paper was to elucidate the significance and potential of establishing developmental stages of cognitive development, as an introduction to and explication of Piaget's developmental stage theory. First, Piaget posited five criteria for developmental stages and established four stages, based on the development of intellectual operations which are realistic frameworks that constrain a person's judgment and reasoning. Second, the formal operational stage was characterized by the whole structure in formal operations, and the implications of this wholeness was clarified by investigating what kind of logico-mathematical structures were contained in it, and how this wholeness was constructed from the whole structure in concrete operations. Finally, as the basis for understanding the significance and potential of Piaget's stage theory, three developmental problems were discussed: the problem of developmental continuity/discontinuity which is one of the main classic themes in developmental psychology; the problem of domain-generality/domain-specificity which is an issue in the study of theory theory; and the problem of generality and/or universality of formal operations which was raised by the editors of this special issue.

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