Lorraine B Robbins, Jiying Ling, Stacey M Wesolek, Anamaria S Kazanis, Kelly A Bourne, Ken Resnicow
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.
Adolescent
Age Factors
Child
Exercise
Factor Analysis, Statistical
Female
Health Promotion
Humans
Male
Perception
Prospective Studies
Psychometrics
Reproducibility of Results
Self Efficacy
Socioeconomic Factors
