Extending the theory of planned behavior: the role of self and social influences in predicting adolescent regular moderate-to-vigorous physical activity.

摘要: The current study aimed to test the validity of an extended theory planned behavior model (TPB; Ajzen, 1991), incorporating additional self and social influences, for predicting adolescent moderate-to-vigorous physical activity. Participants (N = 423) completed initial questionnaire that assessed standard TPB constructs attitude, subjective norm, perceived behavioral control, as well past behavior, self-identity, influence variables group norms, family support, friends’ provisions. One week after completion main questionnaire, participants a follow-up self-reported activity during previous week. variables—past but not support infuences—predicted intentions, with intention, self-identity behavior. Overall, results provide version incor...