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    Interaction effects in the theory of planned behaviour: Predicting fruit and vegetable consumption in three prospective cohorts

    234124_234124.pdf (368.4Kb)
    Access Status
    Open access
    Authors
    Kothe, E.
    Mullan, Barbara
    Date
    2015
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Kothe, E. and Mullan, B. 2015. Interaction effects in the theory of planned behaviour: Predicting fruit and vegetable consumption in three prospective cohorts. British Journal of Health Psychology. 20 (3): pp. 549-562.
    Source Title
    British Journal of Health Psychology
    DOI
    10.1111/bjhp.12115
    ISSN
    1359-107X
    School
    School of Psychology and Speech Pathology
    Remarks

    This is the peer reviewed version of the following article: Kothe, E. and Mullan, B. 2015. Interaction effects in the theory of planned behaviour: Predicting fruit and vegetable consumption in three prospective cohorts. British Journal of Health Psychology. 20 (3): pp. 549-562, which has been published in final form at http://doi.org/10.1111/bjhp.12115. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving at http://olabout.wiley.com/WileyCDA/Section/id-820227.html#terms

    URI
    http://hdl.handle.net/20.500.11937/30979
    Collection
    • Curtin Research Publications
    Abstract

    Objective The theory of planned behaviour (TPB) has been criticized for not including interactions between major constructs thought to underlie behaviour. This study investigated the application of the TPB to the prediction of fruit and vegetable consumption across three prospective cohorts. The primary aim of the study was to investigate whether interactions between major constructs in the theory would increase the ability of the model to predict intention to consume fruit and vegetables (i.e.; attitude × perceived behavioural control [PBC], subjective norm × PBC, subjective norm × attitude) and self-reported fruit and vegetable intake (i.e.; PBC × intention). Design Secondary data analysis from three cohorts: One predictive study (cohort 1) and two intervention studies (cohorts 2 and 3). Method Participants completed a TPB measure at baseline and a measure of fruit and vegetable intake at 1 week (cohort 1; n = 90) or 1 month (cohorts 2 and 3; n = 296). Results Attitude moderated the impact of PBC on intention. PBC moderated the impact of intention on behaviour at 1 week but not 1 month. Conclusion The variance accounted for by the interactions was small. However, the presence of interactions between constructs within the TPB demonstrates a need to consider interactions between variables within the TPB in both theoretical and applied research using the model.

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