Thorough evaluation and systematic instrumentation about self-efficacy related to physical activity (PA) in adolescents is necessary to determine efficacy and effective- ness of intervention on PA behavior. The purpose of this report was to investigate the psychometric properties of a perceived self-efficacy scale for PA. In the observational cross-sectional cohort design, an 11-item Perceived Physical Activity Self-Efficacy Scale was evaluated in a sample of 206 racially diverse adolescents at a Midwestern U.S. public middle school. Participants: The convenience sample included 105 boys and 101 girls from sixth to eighth grade: 47.1% of the participants were European American, 19.4% were African American, and 18% were “other” races and “multi- racial.” The University Institutional Review Board provided approval for conducting the study. The same instruments were delivered to participants on two separate occasions, 2 weeks apart. The results from this study revealed satisfactory internal consistency with Cronbach’s alpha coefficient of .86, and test–retest reliability of .61. Confirmatory factor analysis (CFA) showed a one-factor structure with modest fit. However, the self-efficacy was not related to PA and known-group technique was not supported. The study measure demonstrated satisfactory reliability and construct validity through CFA.
CITATION STYLE
Wu, T.-Y., Robbins, L. B., & Hsieh, H.-F. (2011). Instrument Development and Validation of Perceived Physical Activity Self-Efficacy Scale for Adolescents. Research and Theory for Nursing Practice, 25(1), 39–54. https://doi.org/10.1891/0889-7182.25.1.39
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