卡车司机果蔬消费的社会认知前因：一项序列中介分析
Social Cognitive Antecedents of Fruit and Vegetable Consumption in Truck Drivers: A Sequential Mediation Analysis.
作者信息
Hamilton Kyra, Vayro Caitlin, Schwarzer Ralf
机构信息
School of Applied Psychology, Griffith University, Queensland, Australia; School of Psychology and Speech Pathology, Curtin University, Perth, Australia.
School of Applied Psychology, Griffith University, Queensland, Australia.
出版信息
J Nutr Educ Behav. 2015 Jul-Aug;47(4):379-84.e1. doi: 10.1016/j.jneb.2015.04.325.
OBJECTIVE
To examine a mechanism by which social cognitive factors may predict fruit and vegetable consumption in long-haul truck drivers.
METHODS
Dietary self-efficacy, positive outcome expectancies, and intentions were assessed in 148 Australian truck drivers, and 1 week later they reported their fruit and vegetable consumption. A theory-guided sequential mediation model was specified that postulated self-efficacy and intention as mediators between outcome expectancies and behavior.
RESULTS
The hypothesized model was confirmed. A direct effect of outcome expectancies was no longer present when mediators were included, and all indirect effects were significant, including the 2-mediator chain (β = .15; P < .05; 95% confidence interval, 0.05-0.32). Truck drivers who expected benefits from dietary change, felt confident about being capable to do so, and formed an intention were likely to report larger amounts of fruit and vegetable intake.
CONCLUSIONS AND IMPLICATIONS
The results suggest that the role of outcome expectancies and self-efficacy are important to consider for understanding and predicting healthy eating intentions in truck drivers.
目的
探讨社会认知因素预测长途卡车司机果蔬摄入量的一种机制。
方法
对148名澳大利亚卡车司机进行饮食自我效能感、积极结果期望和意图评估，1周后他们报告自己的果蔬摄入量。构建了一个理论指导的序贯中介模型，假定自我效能感和意图为结果期望与行为之间的中介变量。
结果
假设模型得到证实。纳入中介变量后，结果期望的直接效应不再显著，所有间接效应均显著，包括双中介链（β = 0.15；P < 0.05；95%置信区间为0.05 - 0.32）。预期从饮食改变中获益、对自己有能力做到这一点感到自信并形成意图的卡车司机，更有可能报告摄入了更多的果蔬。
结论与启示
结果表明，结果期望和自我效能感在理解和预测卡车司机的健康饮食意图方面具有重要作用，值得考虑。
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