Behavioral Change Theories Can Inform the Prediction of Young Adults' Adoption of a Plant-based Diet
published online 08 February 2010.
Abstract
Objective
Drawing on the Theory of Planned Behavior (TPB) and the Transtheoretical Model (TTM), this study (1) examines links between stages of change for following a plant-based diet (PBD) and consuming more fruits and vegetables (FV); (2) tests an integrated theoretical model predicting intention to follow a PBD; and (3) identifies associated salient beliefs.
Design
Cross-sectional.
Setting
Large public university in the northeastern United States.
Participants
204 college students.
Main Outcome Measures
TPB and TTM constructs were assessed using validated scales. Outcome, normative, and control beliefs were measured using open-ended questions.
Analysis
The overlap between stages of change for FV consumption and adopting a PBD was assessed using Spearman rank correlation analysis and cross-tab comparisons. The proposed model predicting adoption of a PBD was tested using structural equation modeling (SEM). Salient beliefs were coded using automatic response coding software.
Results
No association was found between stages of change for FV consumption and following a PBD. Results from SEM analyses provided support for the proposed model predicting intention to follow a PBD. Gender differences in salient beliefs for following a PBD were found.
Conclusions and Implications
Results demonstrate the potential for effective theory-driven and stage-tailored public health interventions to promote PBDs.
Department of Health Policy, Management, and Behavior, University at Albany, State University of New York, Rensselaer, NY
Address for correspondence: Brett A. Wyker, MS, New York State Department of Health, Division of Nutrition, Riverview Center, 150 Broadway, FL6 West, Albany, NY 12204-2719
Continuing Education Questionnaire available at www.sne.org/ Meets Learning Need Codes for RDs and DTRs 4000, 4110, and 6010.
ABSTRACT