児童期から青年期への移行とは、青年期という概念の規定が歴史的なものであるにしても、自我の同一性の発達の観点から、一定の質的転換を伴うものであることを仮説的に述べた。その際、エリクソンの自我同一性に関する発達論などを参照しつつ、ワロンが乳児期における表象機能の発生について考察した視点を加えて、新たな同一性感覚の獲得には、情動・姿勢の機能が重要な役割を果たすと考えた。また、スターンの自己感の発達的研究が手掛かりになることを述べた。なお、本稿で議論しないままに残された研究課題は、人格発達の飛躍的移行における時間(ジャネの「時間的人格」)の発達的問題である。

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Various problems in adolescence or transition from childhood to adolescence have been considered deriving from identity diffusion. Recently, some researchers say that the construct of Erikson's identity becomes outdated. But identity diffusion should be reconsidered relating resolutions of the crises in other (previous) stages of psychosocial development. This study clarified the operational definition of Eriksonian industry by surveying Japanese version of four subscales to measure the crisis of latency because there are not many papers on Erikson's forth stage (industry vs. inferiority). According to the view of Kowaz et al., industry consists of three components (cognitive, behavioral and affective), and the items in four subscales cover most of them. But it is necessary to further investigate several aspects of these components, especially the relationship among competition, cooperation and industry. In addition, this study examines a new construct of assumed-competence, which is defined as emotion based on undervaluing others and low self-esteem, in connection with problem of psychosocial development. The new findings were that the undergraduates who demonstrated low assumed-competence showed a more satisfactory resolution to the crises of industry and identity than the subjects showing high assumed-competence, and that assumed-competence significantly correlated with competitive achievement motive, not with achievement motive for self-fulfillment. The pursuit of learning motivation based on the sense of industry is an issue in the future.

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