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    Effects of Self-Efficacy on Healthy Eating Depends on Normative Support: a Prospective Study of Long-Haul Truck Drivers

    256836.pdf (616.2Kb)
    Access Status
    Open access
    Authors
    Hamilton, Kyra
    Hagger, Martin
    Date
    2018
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Hamilton, K. and Hagger, M. 2018. Effects of Self-Efficacy on Healthy Eating Depends on Normative Support: a Prospective Study of Long-Haul Truck Drivers. International Journal of Behavioral Medicine. 25 (2): pp. 265–270.
    Source Title
    International Journal of Behavioral Medicine
    DOI
    10.1007/s12529-017-9685-9
    ISSN
    1070-5503
    School
    School of Psychology and Speech Pathology
    Remarks

    The final publication is available at Springer via http://dx.doi.org/10.1007/s12529-017-9685-9

    URI
    http://hdl.handle.net/20.500.11937/58246
    Collection
    • Curtin Research Publications
    Abstract

    Purpose: Fruit and vegetable intake (FV) is insufficient in industrialized nations and there is excess of discretionary food choices (DC; foods high in fat, sugar, and salt). Long-haul truck drivers are considered a particularly at-risk group given the limited food choices and normatively reinforced eating habits at truck rest-stops. Self-efficacy and normative support are key determinants of eating behavior yet the processes underlying their effects on behavior are not well understood. We tested the direct and interactive effects of self-efficacy and normative support on healthy eating behaviors in long-haul truck drivers in a prospective correlational study. Method: Long-haul truck drivers (N = 82) completed an initial survey containing self-report measures of behavioral intentions, perceived normative support, and self-efficacy for their FV and DC behaviors. Participants completed a follow-up survey 1 week later in which they self-reported their FV and DC behavior. Results: A mediated moderation analysis identified an interactive effect of self-efficacy and normative support on behavior mediated by intention for FV and DC behavior. Specifically, we confirmed a compensation effect in which self-efficacy was more likely to have an effect on FV and DC behavior through intentions in participants with low normative support. Conclusion: Results indicate the importance of self-efficacy in predicting FV and DC intentions and behavior in the absence of a supportive normative environment. The compensatory effect of self-efficacy beliefs on behavior through intentions when normative support is low should be confirmed using experimental methods. © 2017 International Society of Behavioral Medicine

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