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The Korean Journal of Health Psychology

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Vol.24 No.1

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Relationships between Factors from the Theory of Planned Behavior, Optimistic Bias, and Fruit and Vegetable Intake among College Students

The Korean Journal of Health Psychology / The Korean Journal of Health Psychology, (P)1229-070X; (E)2713-9581
2019, v.24 no.1, pp.191-208
https://doi.org/10.17315/kjhp.2019.24.1.009



& (2019). Relationships between Factors from the Theory of Planned Behavior, Optimistic Bias, and Fruit and Vegetable Intake among College Students. The Korean Journal of Health Psychology, 24(1), 191-208, https://doi.org/10.17315/kjhp.2019.24.1.009

Abstract

The purpose of this study is to verify the validity of the Theory of Planned Behavior of a college student's fruit and vegetable intake, to explore the effects of variables from the Theory of Planned Behavior on fruits and vegetables intake, and to evaluate the roles of optimistic bias in their relationships. The participants were 249 male and female college students, whose average of age was 20.57 (SD=2.14). The psychological tests used in this research included the following: a frequency list of vegetables and fruits based on Korean nutrition standards, fruit and vegetable module, questionnaires for attitudes, subjective norms, perceived behavior control, intention, and Optimistic Bias Questionnaires. The results indicated that it is appropriate to adopt the Theory of Planned Behavior model that includes direct pathways from the perceived behavioral control to fruit and vegetable intake. Hierarchical regression analysis revealed that variables from the Theory of Planned Behavior had a 28.8% accountability for fruits and vegetables intake, in which the perceived behavioral control was a determinant variable. In addition, there was an increase of 1.9% accountability of the optimistic bias for fruits and vegetables intake. Optimistic bias also moderated the relationship between the attitude and fruit and vegetable intake. Based on the results of this study, it was reasonable to account for fruit and vegetable intake as Theory of Planned Behavior, and the optimistic bias played an important role in the relationships.

keywords
채소․과일 섭취, 계획된 행동이론, 낙관적 편향, fruit and vegetable intake, Theory of Planned Behavior, optimistic bias

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