Abstract
The aim of this study was to determine to what extent the theory of planned behavior augmented with self-identity, group norm, and group identification is able to predict intentions and exercise behavior. A sample of 166 college students participated in the study. It was prospective in design: measures of attitude, subjective norm, perceived behavioral control, self-identity, group norm and group identification were obtained at the first wave of data collection, whereas physical activity was assessed five weeks later. Hierarchical regression analyses revealed that self-identity significantly predicted behavioral intentions. As expected, the perceived norm of a behaviorally relevant reference group was related to intention, but only for those subjects who identified strongly with the reference group. And the effect of perceived behavioral control, self-identity and group norm(attitude) on physical activity was partially(fully) mediated by behavioral intention. Most importantly, moderated mediation happened: intention mediates group norm-physical activity relationships, particularly when group identification is strong.
Published Version
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