Table_1_Food Insecurity Moderates the Acute Effect of Subjective Socioeconomic Status on Food Consumption.DOCX

Experimentally inducing low subjective socioeconomic status (SSES) increases food consumption in standardized eating opportunities. Separately, food insecurity (FI) has also been shown to be associated with increased food consumption when a free eating opportunity is provided. Here, we assigned 123 adult volunteers to a low-SSES manipulation or a control condition, followed by an opportunity to consume snack foods. We measured FI prior to the experiment. Thus, our experiment served to replicate the effects of SSES and of FI on consumption, and also to establish whether these effects combine additively or interactively. The low-SSES manipulation increased food consumption, but only among participants who were food secure at baseline. Among food-insecure participants, the effect was reversed. This interaction was not predicted a priori and is presented as an exploratory finding. We also found evidence that both SSES and FI affected the hedonic evaluation of the snack foods, though the changes in evaluation did not mediate the changes in consumption. Our findings suggest that both FI and low SSES affect the consumption and evaluation of food. Their combined effects on consumption may be complex.

实验性诱导降低主观社会经济地位（subjective socioeconomic status, SSES），可在标准化进食场景中提升食物摄入量。另有研究显示，当提供免费进食机会时，粮食不安全（food insecurity, FI）同样与食物摄入量增加存在关联。本研究将123名成年志愿者分配至低主观社会经济地位诱导组或对照组，随后为其提供零食进食机会；实验前我们已完成对志愿者粮食不安全状况的测评。据此，本实验旨在重复验证主观社会经济地位与粮食不安全对食物摄入量的影响，并厘清二者的效应是叠加存在还是存在交互作用。低主观社会经济地位诱导确实提升了食物摄入量，但该效应仅见于基线时粮食安全的参与者；而在基线粮食不安全的参与者中，该效应发生反转。该交互效应并非事前预设的研究假说，仅作为探索性发现予以报告。此外，本研究还发现，主观社会经济地位与粮食不安全均会影响参与者对零食的享乐性评价，但评价维度的变化并未对摄入量的变化起到中介作用。本研究结果表明，粮食不安全与低主观社会经济地位均会对食物摄入量及食物评价产生影响，二者对食物摄入量的联合效应或较为复杂。