a Department of Psychology , Freie Universität Berlin , Berlin , Germany.
b Nutrition Research Foundation , University of Barcelona Science Park , Barcelona , Spain.
Psychol Health. 2018 May;33(5):652-668. doi: 10.1080/08870446.2017.1385785. Epub 2017 Oct 9.
An online intervention to improve fruit and vegetable (FV) intake examines the role of planning, outcome expectancies, self-efficacy and gender. Women are not only expected to eat more FV than men, but they are also expected to be more responsive to nutritional advice and benefit more from treatment.
A two-arm digital intervention with 269 men and 395 women (M = 41.2, SD = 11.45; range: 19-66 years) was conducted in Italy, Spain and Greece, followed up at three and six months, comparing a static with a dynamic, feedback-intensive platform.
Linear mixed models yielded an increase in FV consumption in both the dynamic and the static intervention arms. In men, outcome expectancies were positively related to follow-up FV intake. Dietary planning interacted with self-efficacy on behavioural outcomes.
FV intake increased overall, and being a woman and involvement in planning facilitated behaviour change. Women seemed to be more engaged in the dynamic platform resulting in a higher amount of planning. Initial motivation, as indicated by outcome expectancies, seemed to be beneficial for men. Self-efficacious individuals benefitted from their engagement in planning, but self-efficacy did not compensate for failing to plan.
一项旨在改善水果和蔬菜（FV）摄入量的在线干预措施，考察了计划、预期结果、自我效能和性别因素的作用。人们普遍认为女性不仅应该比男性摄入更多的 FV，而且对营养建议的反应也应该更敏感，从治疗中获益更多。
在意大利、西班牙和希腊进行了一项具有 269 名男性和 395 名女性参与者（M=41.2，SD=11.45；年龄范围：19-66 岁）的两臂数字干预研究，分别比较了静态和动态、反馈密集型平台，随访时间为 3 个月和 6 个月。
线性混合模型显示，在动态和静态干预组中，FV 的摄入量都有所增加。在男性中，预期结果与随访期间的 FV 摄入量呈正相关。饮食计划与自我效能在行为结果上存在交互作用。
总体而言，FV 的摄入量增加了，而女性身份和参与计划有助于行为改变。女性似乎更热衷于使用动态平台，从而进行了更多的计划。如预期结果所示，最初的动机对男性似乎是有益的。有自我效能感的个体从他们的计划参与中受益，但自我效能并不能弥补计划的失败。
