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Reliability and Validity of the Commitment to Physical Activity Scale for Adolescents
Lorraine B Robbins1, Jiying Ling1, Stacey M Wesolek1
11 Michigan State University College of Nursing, East Lansing, Michigan.
American Journal of Health Promotion : AJHP
|January 6, 2016
Summary
The 11-item Commitment to Physical Activity Scale for Adolescents (CPASA) shows good reliability and validity for measuring adolescent girls' commitment to physical activity. This scale accurately reflects engagement in light, moderate, and vigorous physical activity.
Area of Science:
- Adolescent Health
- Behavioral Science
- Psychometrics
Background:
- Physical activity is crucial for adolescent health.
- Measuring commitment to physical activity aids in understanding adherence.
- Existing scales may require refinement for adolescent populations.
Purpose of the Study:
- To evaluate the psychometric properties of the Commitment to Physical Activity Scale for Adolescents (CPASA).
- To establish the reliability and validity of the CPASA in a sample of adolescent girls.
Main Methods:
- Conducted two test-retest studies and one prospective study involving 51, 91, and 503 adolescent girls, respectively.
- Administered the 11-item CPASA and measured physical activity using accelerometers (LMVPA and MVPA).
- Assessed internal consistency, test-retest reliability, and factor structure using exploratory and confirmatory factor analysis.
Main Results:
- The 11-item CPASA demonstrated strong internal consistency (Cronbach's α = .81–.82) and excellent test-retest reliability (.88).
- Factor analysis confirmed a single-factor structure for the scale.
- The CPASA showed significant correlations with measured light, moderate, and vigorous physical activity (LMVPA) and moderate to vigorous physical activity (MVPA).
Conclusions:
- The 11-item CPASA is a reliable and valid measure for assessing commitment to physical activity in adolescent girls.
- The findings support the use of CPASA in research and practice related to adolescent physical activity.
- The scale's correlation with objective physical activity measures indicates its relevance in predicting behavior.
Keywords:
Female, Exercise, Adolescent, Motivation, Factor analysis, Measures, Prevention Research. Manuscript format: researchHealth focus: fitness/physical activityOutcome measure: cognitive and behavioralResearch purpose: instrument developmentSetting: local community and schoolsStrategy: skill development/behavior changeStudy design: nonexperimentalTarget population age: youthTarget population circumstances: education/income level, geographic location, race-ethnicity
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