Development and evaluation of social cognitive measures related to adolescent dietary behaviors

International Journal of Behavioral Nutrition and Physical Activity

Philip J Morgan¹  Ronald C Plotnikoff¹  David R Lubans¹  Deborah L Dewar¹ 

[1] Priority Research Centre in Physical Activity and Nutrition, School of Education, University of Newcastle, Callaghan Campus, Newcastle, Australia

关键词: Dietary behavior;    Adolescents;    Measures;    Social cognitive;   

Others  :  825168
DOI  :  10.1186/1479-5868-9-36

 received in 2011-12-05, accepted in 2012-03-26,  发布年份 2012

【 摘 要 】

Background

This study aimed to develop and evaluate the reliability and factorial validity, of social-cognitive measures related to adolescent healthy eating behaviors.

Methods

A questionnaire was developed based on constructs from Bandura’s Social Cognitive Theory and included the following scales: self-efficacy, intentions (proximal goals), situation (perceived environment), social support, behavioral strategies, outcome expectations and expectancies. The questionnaire was administered with a two week test-retest among secondary school students (n = 173, age = 13.72 ± 1.24). Confirmatory factor analysis was employed to examine model-fit for each scale using multiple indices including: chi-square index, comparative-fit index (CFI), goodness-of-fit index (GFI), and the root mean square error of approximation (RMSEA). Reliability properties were also examined (ICC and Cronbach’s alpha).

Results

The reliability and factorial validity of each scale is supported: fit indices suggest each model to be an adequate-to-exact fit to the data; internal consistency was acceptable-to-good (α=0.65−0.79); rank order repeatability was strong (ICC = 0.81−0.89).

Conclusions and implications

Results support the reliability and factorial validity of social cognitive scales relating to healthy eating behaviors among adolescents. As such, the developed scales have utility for identifying potential social cognitive correlates of adolescent dietary behavior, mediators of dietary behavior change and validity testing of theoretical models based on Social Cognitive Theory.

【 授权许可】

   
2012 Dewar et al.; licensee BioMed Central Ltd.

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