Peng M
Department of Food Science University of Otago Dunedin New Zealand.
Obes Sci Pract. 2017 Jun 27;3(3):282-288. doi: 10.1002/osp4.119. eCollection 2017 Sep.
Manipulating plate sizes could possibly introduce perceptual biases for judging food satiation and intake, which is thought to be related to the Delbeouf illusion - a visual illusion based on the perceived size of one object related to another. This study was to investigate whether an association exists between an individual's susceptibility to the plate-size-effect and their weight status (i.e. normal-weight versus overweight).
The study assessed the effect of plate size amongst normal-weight ( = 124) and overweight ( = 79) New Zealand Europeans. All participants were asked to rate estimated satiation (ES) and intake (EI) on Visual Analogue Scales for 20 food images, which comprised photographs of ten different dishes placed on large versus small plates. These responses were analysed by mixed-model ANCOVA.
The results showed that the plate size had significant effects on ES ( = 19.14, < 0.001) and EI ( = 5.25; = 0.048), with the small plate associated with higher ES and lower EI than the large plate. Significant differences in ES and EI were also evident across the weight groups (ES: = 4.26, = 0.039; EI: = 42.22, < 0.001), with the normal-weight group reported higher ES and lower EI than the overweight group. Furthermore, the weight group and the plate-size-effect were found to be involved in a significant interaction for EI. Post-hoc tests showed that the plate size only had a significant effect for the normal-weight group ( < 0.05), but not for the overweight group.
Overall, the study demonstrated that the normal-weight and overweight group differed in their susceptibilities to the plate-size-effect (reflected by EI). This study revealed some potential moderators for the plate-size-effect, such as the type of dish, and its associated appeal and familiarity, and provided useful indications about the effectiveness of small plates for food reduction.
改变餐盘大小可能会在判断食物饱腹感和摄入量时引入感知偏差，这被认为与德勃夫错觉有关——一种基于一个物体与另一个物体的感知大小的视觉错觉。本研究旨在调查个体对餐盘大小效应的易感性与其体重状况（即正常体重与超重）之间是否存在关联。
该研究评估了餐盘大小对正常体重（n = 124）和超重（n = 79）的新西兰欧洲人的影响。所有参与者被要求在视觉模拟量表上对20张食物图片的估计饱腹感（ES）和摄入量（EI）进行评分，这些图片包括放在大盘子和小盘子上的十种不同菜肴的照片。这些反应通过混合模型协方差分析进行分析。
结果表明，餐盘大小对ES（F = 19.14，p < 0.001）和EI（F = 5.25；p = 0.048）有显著影响，与大盘子相比，小盘子与更高的ES和更低的EI相关。体重组之间ES和EI也存在显著差异（ES：F = 4.26，p = 0.039；EI：F = 42.22，p < 0.001），正常体重组报告的ES高于超重组，EI低于超重组。此外，发现体重组和餐盘大小效应在EI方面存在显著交互作用。事后检验表明，餐盘大小仅对正常体重组有显著影响（p < 0.05），对超重组没有影响。
总体而言，该研究表明正常体重组和超重组对餐盘大小效应的易感性不同（由EI反映）。本研究揭示了一些餐盘大小效应的潜在调节因素，如菜肴类型及其相关的吸引力和熟悉程度，并为使用小盘子减少食物摄入量的有效性提供了有用的指示。
