Motivational versus social cognitive interventions for promoting fruit and vegetable intake and physical activity in African American adolescents

Ann Behav Med. 2002 Fall;24(4):310-9. doi: 10.1207/S15324796ABM2404_07.

Abstract

Strategic self-presentation (motivational intervention [MI]) is a theoretical approach that is distinct from social cognitive theory (SCT). Specifically, strategic self-presentation involves increasing motivation by creating cognitive dissonance and inducing shifts in self-concept by generating positive coping strategies during a videotaped session. Fifty-three healthy African American adolescents were randomized to a SCT+MI, SCT-only, or an education-only group for increasing fruit and vegetable (F&V) intake and physical activity. The SCT+MI and SCT-only groups received a 12-week SCT program. Students in the SCT+MI group also participated in a strategic self-presentation videotape session. Participants completed 3-day food records, completed measures of self-concept and self-efficacy, and wore an activity monitor for 4 days at pre- and posttreatment. Both the SCT+MI (2.6 +/- 1.4 vs. 5.7 +/- 2.2, p < .05) and the SCT-only (2.5 +/- 1.2 vs. 4.8 +/- 2.4, p < .05) groups showed greater increases in F&V intake from pre- to posttreatment as compared with the education-only group (2.3 +/- 1.0, vs. 3.3 +/- 2.1, p > .05). There were no significant time or group effects for any of the physical activity measures. Correlation analyses revealed that only the SCT+MI group showed that dietary self-concept (r = .58, r = .67, p < .05) and dietary self-efficacy (r = .65, r = .85, p < .05) were significantly correlated with posttreatment F&V intake and change in F&V intake, respectively. These findings suggest that the change in F&V intake in the SCT+MI group resulted from strategic self-presentation, which induced positive shifts in self-concept and self-efficacy.

Publication types

  • Clinical Trial
  • Multicenter Study
  • Randomized Controlled Trial
  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • Adolescent
  • Analysis of Variance
  • Black or African American*
  • Cardiovascular Diseases / prevention & control
  • Child
  • Cognitive Science
  • Exercise*
  • Feeding Behavior*
  • Female
  • Fruit
  • Health Promotion / methods*
  • Humans
  • Male
  • Motivation
  • Psychological Theory
  • Self Concept
  • Self Efficacy
  • United States
  • Vegetables