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The Mediating Role of Intention and Stages of Change in Physical Activity Among Adults with Physical Disabilities: An Integrative Framework

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  • The study’s purpose was to identify the mediating role of intention and the stages of change (SOC) in physical activity (PA) over a 6-month period using two models (Theory of Planned Behavior [TPB] and TPB/SOC). Participants were 143 adults with physical disabilities (70.68% response rate; M age = 46.03). The TPB constructs, SOC (time 1), and PA (time 2) were assessed using standardized self-report questionnaires. Based on path analyses, attitude had the highest effect on intention and SOC followed by perceived behavioral control within both well-fit models. The variance in PA explained by the first (TPB) and second (TPB/SOC) models was 16% and 28% respectively. In the just identified model of TPB/SOC, the direct effect of SOC on physical activity remained strong (γ[subscript soc·pa] = .45) and SOC approached full mediation through attitude. Health promotion interventions need to include both intention and behavior elements (SOC) reinforcing increased PA value and barrier elimination.
  • This is the publisher’s final pdf. The published article is copyrighted by Human Kinetics, Inc. and can be found at: http://journals.humankinetics.com/jsep.
  • Keywords: Theory of planned behavior, Web-based study, Prospective design, Transtheoretical model
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  • Kosma, M., Gardner, R. E., Cardinal, B. J., Bauer, J. J., & McCubbin, J. A. (2007). The mediating role of intention and stages of change in physical activity among adults with physical disabilities: An integrative framework. Journal of Sport and Exercise Psychology, 29, 21-38.
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  • 29
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  • 1
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  • Sincere appreciation is also expressed to the funding agents for this project: a) National Institute on Disability and Rehabilitation Research (Grant No. H133B990019), United States Department of Education, and b) International Trade and Development Graduate Fellowship, Nippon Foundation, Oregon University System.
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