Explaining dietary intake in adolescent girls from disadvantaged secondary schools. A test of Social Cognitive Theory

Lubans, David R., Plotnikoff, Ronald C., Morgan, Philip J., Dewar, Deborah, Costigan, Sarah and Collins, Clare E. 2012, Explaining dietary intake in adolescent girls from disadvantaged secondary schools. A test of Social Cognitive Theory, Appetite, vol. 58, no. 2, pp. 517-524, doi: 10.1016/j.appet.2011.12.012.

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Title Explaining dietary intake in adolescent girls from disadvantaged secondary schools. A test of Social Cognitive Theory
Author(s) Lubans, David R.
Plotnikoff, Ronald C.
Morgan, Philip J.
Dewar, Deborah
Costigan, SarahORCID iD for Costigan, Sarah orcid.org/0000-0003-2566-3276
Collins, Clare E.
Journal name Appetite
Volume number 58
Issue number 2
Start page 517
End page 524
Total pages 8
Publisher Elsevier
Place of publication Amsterdam, The Netherlands
Publication date 2012-04
ISSN 0195-6663
Keyword(s) Social Cognitive Theory
dietary behavior
Adolescent Behavior
Feeding Behavior
Health Behavior
Health Education
Health Promotion
Models, Theoretical
Self Efficacy
Social Support
Summary Much of the research on the determinants of dietary behavior has been guided by Bandura's Social Cognitive Theory (SCT), yet few studies have tested the utility of its proposed structural paths. The aim of this paper was to test the capacity of SCT to explain dietary behaviors in a sample of 357 adolescent girls (13.2±0.5 years) from 12 secondary schools located in low-income communities in New South Wales, Australia. Participants completed validated SCT scales assessing nutrition-related self-efficacy, intention, behavioral strategies, family support, situation, outcome expectations, and outcome expectancies. Participants completed a validated food frequency questionnaire, from which, the percentage of total kilojoules from core-foods, non-core foods and saturated fat were calculated. The theoretical models were tested using structural equation modeling in AMOS. The models explained 48-51% and 13-19% of the variance in intention and dietary behavior, respectively. The models provided an adequate fit to the data, and self-efficacy was positively associated with healthy eating and inversely associated with unhealthy eating. However, the pathway from intention to behavior was not statistically significant in any of the models. While this study has demonstrated the utility of SCT constructs to explain behavior in adolescents girls, the proposed structural pathways were not supported. Further study of the role that implementation intentions play in explaining adolescent girls' dietary behaviors is required.
Language eng
DOI 10.1016/j.appet.2011.12.012
Field of Research 111199 Nutrition and Dietetics not elsewhere classified
Socio Economic Objective 970111 Expanding Knowledge in the Medical and Health Sciences
HERDC Research category C1.1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2012, Elsevier
Persistent URL http://hdl.handle.net/10536/DRO/DU:30086813

Document type: Journal Article
Collections: Faculty of Health
School of Exercise and Nutrition Sciences
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