Health Behavior and Health Education
theory, research, and practice
theory, research, and practice
SCT applied to an intervention
A Computerized Social Cognitive Intervention for Nutrition Behavior: Direct and Mediated Effects on Fat, Fiber, Fruits, and Vegetables, Self-Efficacy, and Outcome Expectations Among Food Shoppers.
Sources:
Eileen S. Anderson, Richard A. Winett, Janet R. Wojcik, Sheila Winett, and Todd Bowden (2001) in Annals of Behavioral Medicine, 23(2):88-100.
Anderson, ES, Winett, RA, Wojcik, RJ. Social cognitive determinants of nutrition behavior among supermarket food shoppers: a structural equation analysis. Health Psychology 2000, 19(5): 479-486
Purpose of study: Examine the impact of self-administered, computer-based intervention on nutrition behavior, self-efficacy, and outcome expectations among supermarket food shoppers.
Population: Supermarket shoppers (96% female, 92% White, mean annual income of $35,000).
Sample size: 277 total (148 control, 129 intervention).
Study Description: Participants accessed grocery store kiosks for tailored messages about healthy eating and received coupons to purchase healthy food ($8-$12). 15 weekly sessions were offered, and most participants accessed 10 segments.
SCT constructs used: Self efficacy, self-regulation, and outcome expectations. The kiosk provided users with personalized nutrition information, behavioral strategies, and goal-setting activities.
Results: Intervention group demonstrated the following:
Self-efficacy - Was measured using The Nutrition for a Lifetime System (NLS) Food Beliefs Survey which has a total of 48 items and is comprised of three subscales which assess the following areas in nutrition self-efficacy:
Participants rated their certainty in performing these behaviors on a 10 point Likert scale ranging from: 1 (very sure I cannot) to 10 (very sure I can).
Outcome expectations - Were measured using a 46 item scale that is comprised of four subscales which assess the following areas pertaining to nutrition:
Participants used a 5-point Likert scale to indicate agreement (1=strongly disagree, 5 = strongly agree).
Individual, Social Environmental, and Physical Environmental Influences on Physical Activity Among Black and White Adults: A Structural Equation Analysis.
Source: Lorna Haughton McNeill, Kathleen W. Wyrwich, Ross C. Brownson, Eddie M. Clark, Matthew W. Kreuter in Annals of Behavioral Medicine, 2006, Vol. 31, No. 1, 36-44.
Purpose of study: To examine direct and indirect effects of individual, social environmental, and physical environmental factors on physical activity.
Population and Sample Size: 910 African-American and White lower and middle-income adults between ages 18 and 64.
Study description: Participants were recruited from waiting rooms in Missouri public health centers. They were asked complete to a self-administered survey assessing their current physical activity level and other SCT constructs surrounding exercise.
SCT constructs examined Self efficacy, motivation, social support, environmental factors (neighborhood quality and access to facilities).
Results: Perceptions of the physical environment had direct effects on physical activity. Self-efficacy was the strongest correlate of physical activity, and a positive dose-response relationship was shown between self-efficacy and intensity of physical activity.
Measurement of SCT constructs: