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Journal of Pediatric Psychology Advance Access first published online on September 23, 2008
This version published online on September 30, 2008
Journal of Pediatric Psychology, doi:10.1093/jpepsy/jsn100
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© The Author 2008. Published by Oxford University Press on behalf of the Society of Pediatric Psychology. All rights reserved. For permissions, please e-mail: journals.permissions@oxfordjournals.org

Self-Efficacy Moderates the Relation Between Declines in Physical Activity and Perceived Social Support in High School Girls

Rod K. Dishman, PhD1, Ruth P. Saunders, PhD2, Robert W. Motl, PhD3, Marsha Dowda, DrPH4 and Russell R. Pate, PhD4

1Department of Kinesiology, University of Georgia, 2Health Promotion, Education, and Behavior, University of South Carolina, 3Department of Kinesiology, University of Illinois and 4Department of Exercise Science, University of South Carolina

All correspondence concerning this article should be addressed to Rod K. Dishman, Department of Kinesiology, The University of Georgia, Ramsey Student Center, 330 River Road, Athens, GA 30602-6554, USA. E-mail: rdishman{at}uga.edu


  Abstract

Objective To test whether self-efficacy for overcoming barriers to physical activity has direct, indirect (i.e., mediated), or moderating relations with naturally occurring change in perceived social support and declines in physical activity during high school. Methods Latent growth modeling was used with measures completed in the 8th, 9th, and 12th grades by a cohort of 195 Black and White girls. Results Self-efficacy was stable and moderated the relation between changes in physical activity and perceived social support. Girls who maintained a perception of strong social support had less of a decline in physical activity if they also had high self-efficacy. However, girls having high self-efficacy had a greater decline in physical activity if they perceived declines in social support. Conclusions Randomized controlled trials of physical activity interventions based on social cognitive theory should consider that the influence of girls’ perceptions of social support on their physical activity may differ according to their efficacy beliefs about barriers to physical activity.

Key words: adolescents; growth curve analysis; health behavior; race/ethnicity.

Received April 25, 2008; revision received September 2, 2008; accepted September 3, 2008


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[Abstract] [Full Text] [PDF]


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