PURPOSE: To examine psychometric properties of a Commitment to Physical Activity Scale for Adolescents (CPASA). DESIGN: Two test-retest studies and a prospective study, approved by a university institutional review board, were conducted in midwestern U.S. urban areas. SETTING: The first test-retest study occurred in four community centers, the second test-retest study took place in a community school, and the prospective study occurred in eight middle schools. SUBJECTS: To measure commitment at baseline and 1 week later, 51 girls in the first test-retest study completed an original 26-item scale, and 91 in the second test-retest study completed a revised 11-item scale. In the prospective study, 503 girls completed the 11-item scale. MEASURES: Commitment was measured via the CPASA. After completing the CPASA, girls in the prospective study wore ActiGraph GT3X-plus accelerometers that measured light, moderate, and vigorous physical activity (LMVPA) and moderate to vigorous physical activity (MVPA). ANALYSIS: Internal consistency and test-retest reliability were estimated. Both exploratory factor analysis (EFA) and confirmatory factor analysis (CFA) were conducted to cross-validate the factor structure. RESULTS: For the 11-item CPASA, Cronbach α ranged from .81 to .82, and test-retest reliability was .88. Both EFA and CFA indicated a single factor. The scale was significantly correlated with LMVPA (r = .10) and MVPA (r = .11). CONCLUSION: The 11-item CPASA demonstrated acceptable reliability and validity with girls.
PURPOSE: To examine psychometric properties of a Commitment to Physical Activity Scale for Adolescents (CPASA). DESIGN: Two test-retest studies and a prospective study, approved by a university institutional review board, were conducted in midwestern U.S. urban areas. SETTING: The first test-retest study occurred in four community centers, the second test-retest study took place in a community school, and the prospective study occurred in eight middle schools. SUBJECTS: To measure commitment at baseline and 1 week later, 51 girls in the first test-retest study completed an original 26-item scale, and 91 in the second test-retest study completed a revised 11-item scale. In the prospective study, 503 girls completed the 11-item scale. MEASURES: Commitment was measured via the CPASA. After completing the CPASA, girls in the prospective study wore ActiGraph GT3X-plus accelerometers that measured light, moderate, and vigorous physical activity (LMVPA) and moderate to vigorous physical activity (MVPA). ANALYSIS: Internal consistency and test-retest reliability were estimated. Both exploratory factor analysis (EFA) and confirmatory factor analysis (CFA) were conducted to cross-validate the factor structure. RESULTS: For the 11-item CPASA, Cronbach α ranged from .81 to .82, and test-retest reliability was .88. Both EFA and CFA indicated a single factor. The scale was significantly correlated with LMVPA (r = .10) and MVPA (r = .11). CONCLUSION: The 11-item CPASA demonstrated acceptable reliability and validity with girls.
Entities:
Keywords:
Female, Exercise, Adolescent, Motivation, Factor analysis, Measures, Prevention Research. Manuscript format: research; Health focus: fitness/physical activity; Outcome measure: cognitive and behavioral; Research purpose: instrument development; Setting: local community and schools; Strategy: skill development/behavior change; Study design: nonexperimental; Target population age: youth; Target population circumstances: education/income level, geographic location, race-ethnicity
Authors: Rod K Dishman; Derek P Hales; James F Sallis; Ruth Saunders; Andrea L Dunn; Ariane L Bedimo-Rung; Kimberly B Ring Journal: J Pediatr Psychol Date: 2009-05-11
Authors: Richard P Troiano; David Berrigan; Kevin W Dodd; Louise C Mâsse; Timothy Tilert; Margaret McDowell Journal: Med Sci Sports Exerc Date: 2008-01 Impact factor: 5.411