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Measurement of Physical Activity Self-Efficacy in Adults With Obesity: A Latent Variable Approach to Explore Dimensionality, Temporal Invariance, and External Validity

Journal of Sport and Exercise Psychology, ISSN: 1543-2904, Vol: 43, Issue: 6, Page: 497-513
2021
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Article Description

The objective of this study was to improve the measurement of physical activity self-efficacy (PASE) in adults with obesity. To accomplish this objective, a latent variable approach was used to explore dimensionality, temporal invariance, and external validity of responses to a newly developed battery of PASE scales. Data (N = 461 and N days = 427) from the Well-Being and Physical Activity Study (ClinicalTrials.gov, identifier: NCT03194854), which deployed the Fun For Wellness intervention, were analyzed. A two-dimensional factor structure explained responses to each PASE scale at baseline. There was strong evidence for at least partial temporal measurement invariance for this two-dimensional structure in each PASE scale. There was mixed evidence that the effectiveness of the Fun For Wellness intervention exerted a direct effect on latent PASE in adults with obesity at 30 days postbaseline (i.e., external validity) of this two-dimensional structure.

Bibliographic Details

Myers, Nicholas D; Bateman, André G; McMahon, Adam; Prilleltensky, Isaac; Lee, Seungmin; Prilleltensky, Ora; Pfeiffer, Karin A; Brincks, Ahnalee M

Human Kinetics

Psychology

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