Department of Psychology (University of Jaén), Campus Las Lagunillas, 23071, Jaén, Spain.
Department of Behavioral Science, The University of Texas MD Anderson Cancer Center, Houston, TX, USA.
Appetite. 2022 Jan 1;168:105687. doi: 10.1016/j.appet.2021.105687. Epub 2021 Sep 9.
It has been proposed that some individuals succumb to maladaptive eating behaviors because, like those with addiction, they attribute high incentive salience to food-associated cues. Here, we tested whether women that attribute high incentive salience to food-associated cues report high food addiction symptomatology. In 76 college women, we assessed self-reported food addiction symptoms using the Yale Food Addiction Scale and we recorded event-related potentials (ERPs, a direct measure of brain activity) to preferred food, erotic, unpleasant, and neutral images. We used the amplitude of the late positive potential (LPP, a component of the ERPs) as an index of the incentive salience attributed to the images. Using a multivariate classification algorithm (k-means cluster analysis), we identified two neuroaffective reactivity profiles that have been previously associated with individual differences in the tendency to attribute incentive salience to cues and with differences in vulnerability to addictive behaviors. Results showed that women with elevated LPP responses to preferred food cues relative to erotic images report higher food addiction symptoms than women with low LPP responses to preferred food cues relative to other motivationally relevant stimuli. These results support the hypothesis that individual differences in the tendency to attribute incentive salience to food cues play an important role in modulating food addiction symptomatology.
有人提出，有些人屈服于适应不良的进食行为，因为他们像那些有上瘾问题的人一样，将高激励显著性归因于与食物相关的线索。在这里，我们测试了那些将高激励显著性归因于与食物相关线索的女性是否报告了高食物成瘾症状。在 76 名女大学生中，我们使用耶鲁食物成瘾量表评估了自我报告的食物成瘾症状，并记录了与喜欢的食物、色情、不愉快和中性图像相关的事件相关电位（ERP，大脑活动的直接测量）。我们使用晚期正电位（LPP，ERP 的一个组成部分）的振幅作为归因于图像的激励显著性的指标。使用多元分类算法（k-均值聚类分析），我们确定了两种神经反应性特征，这些特征与归因于线索的激励显著性的倾向的个体差异以及对成瘾行为的易感性差异有关。结果表明，与其他动机相关刺激相比，对喜欢的食物线索的 LPP 反应较高的女性比对喜欢的食物线索的 LPP 反应较低的女性报告更高的食物成瘾症状。这些结果支持了这样一种假设，即归因于食物线索的激励显著性的个体差异在调节食物成瘾症状方面起着重要作用。
