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This version was published on June 1, 2008
Health Education & Behavior, Vol. 35, No. 3, 316-331 (2008)
DOI: 10.1177/1090198106297060
© 2008 Society for Public Health Education

Physical Activity Belief Scales for Diabetes Risk: Development and Psychometric Testing

Carolyn L. Blue, RN, PhD, CHES

University of North Carolina-Greensboro, clblue2{at}uncg.edu

David G. Marrero, PhD

Indiana University School of Medicine, Indianapolis

David R. Black, PhD, MPH, HSPP, CHES, CPPE, FASHA, FSBM, FAAHB

Purdue University, West Lafayette, Indiana

This article describes the development and psychometric evaluation of behavioral belief, normative belief, and control belief scales, derived from the theory of planned behavior to predict physical activity intentions of persons at risk for diabetes. In Study 1, belief statements from interviews were categorized, ranked, and evaluated for item construction. Content validity was established by 96.1% agreement among a five-member expert panel. In Study 2, items developed from the belief statements were administered to 106 adults at risk for diabetes. Psychometric analyses provided evidence of construct validity and reliability of the three scales. Internal consistency was sufficient ({alpha} = .76-.95), and test-retest evaluations indicated scale stability (r = .79-.91). Factor analyses and confirmatory factor analysis using structural equation modeling provided evidence that the items were appropriately grouped under each construct. Researchers and practitioners can use these measures to assess behavioral, normative, and control beliefs about physical activity among persons at risk for diabetes.

Key Words: theory of planned behavior • type 2 diabetes • physical activity beliefs


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