Incollingo Rodriguez Angela C, Finch Laura E, Buss Julia, Guardino Christine M, Tomiyama A Janet
Department of Psychology, University of California, Los Angeles, Los Angeles, CA, USA.
School of Nursing, University of California, San Francisco, San Francisco, CA, USA.
Appetite. 2015 Jun;89:215-8. doi: 10.1016/j.appet.2015.02.016. Epub 2015 Feb 16.
Laboratory research has found that individuals will consume more calories and make unhealthy food choices when in the presence of an overweight individual, sometimes even regardless of what that individual is eating. This study expanded these laboratory paradigms to the field to examine how weight salience influences eating in the real world. More specifically, we tested the threshold of the effect of weight salience of food choice to see if a more subtle weight cue (e.g., images) would be sufficient to affect food choice. Attendees (N = 262) at Obesity Week 2013, a weight-salient environment, viewed slideshows containing an image of an overweight individual, an image of a thin individual, or no image (text only), and then selected from complimentary snacks. Results of ordinal logistic regression analysis showed that participants who viewed the image of the overweight individual had higher odds of selecting the higher calorie snack compared to those who viewed the image of the thin individual (OR = 1.77, 95% CI = [1.04, 3.04]), or no image (OR = 2.42, 95% CI = [1.29, 4.54]). Perceiver BMI category did not moderate the influence of image on food choice, as these results occurred regardless of participant BMI. These findings suggest that in the context of societal weight salience, weight-related cues alone may promote unhealthy eating in the general public.
实验室研究发现，当身边有超重的人时，个体往往会摄入更多热量并做出不健康的食物选择，有时甚至不管那个人在吃什么。这项研究将这些实验室范式扩展到现实场景，以考察体重显著性如何在现实世界中影响饮食。更具体地说，我们测试了体重显著性对食物选择影响的阈值，看看更微妙的体重线索（如图片）是否足以影响食物选择。2013年肥胖症周活动的参与者（N = 262），这是一个体重显著性较高的环境，他们观看了包含超重个体图片、瘦个体图片或无图片（只有文字）的幻灯片，然后从免费零食中进行选择。有序逻辑回归分析结果显示，与观看瘦个体图片的参与者相比，观看超重个体图片的参与者选择高热量零食的几率更高（OR = 1.77，95%CI = [1.04, 3.04]），与观看无图片的参与者相比也是如此（OR = 2.42，95%CI = [1.29, 4.54]）。感知者的BMI类别并未调节图片对食物选择的影响，因为无论参与者的BMI如何，都会出现这些结果。这些发现表明，在社会体重显著性的背景下，仅与体重相关的线索可能就会促使普通大众做出不健康的饮食选择。
