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Dev Psychol. 2017 Aug;53(8):1501-1521. doi: 10.1037/dev0000355. Epub 2017 May 29.

Adolescents' body image trajectories: A further test of the self-equilibrium hypothesis.

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Department of Psychology, Concordia University.
Cyberpsychology Laboratory, Department of Psychoeducation and Psychology, Université du Québec en Outaouais.
Università degli Studi di Cagliaria.
School Environment Research Group, School of Psychoeducation, University of Montréal.
Faculté des sciences de l'éducation, Université Laval.


The self-equilibrium hypothesis underlines the importance of having a strong core self, which is defined as a high and developmentally stable self-concept. This study tested this hypothesis in relation to body image (BI) trajectories in a sample of 1,006 adolescents (Mage = 12.6, including 541 males and 465 females) across a 4-year period. The results supported the self-equilibrium hypothesis among 3 profiles of adolescents, all characterized by matching BI levels and stability: (a) High (48.0%); (b) Increasing (34.1%); and (c) Decreasing (17.9%). Boys presented higher levels of BI, and the quality of relationships with peers and parents predicted initially more desirable trajectories across gender. By the end of the study, more positive academic outcomes were associated with the Decreasing profile, lower internalizing problems with the High profile, and lower externalizing problems with the High and the Increasing profiles. (PsycINFO Database Record.

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