Department of Psychology, Southwest University, Chongqing, 400715, China.
School of Educational Sciences, Chongqing Normal University, 401331, China.
Physiol Behav. 2024 Dec 1;287:114704. doi: 10.1016/j.physbeh.2024.114704. Epub 2024 Sep 29.
Restrained eaters are individuals who consciously follow a limited food intake diet to lose or maintain body weight. With the rising numbers of obesity cases, retrained eating has became more prevalent as more people adopt it to cope with obesity. The dual conflict theory states that restrained eaters often encounter conflicting choices of food pleasure and weight management. The present study investigated the difference in food choice regarding different presentations of the weight management goal. The study hypothesized difference in successful and unsuccessful restrained eaters' food choice when presented with the conflicting food/weight maintenance stimuli. A total of 49 college students participated in the study and the N2, P3 and LPP event-related potentials (ERPs) were investigated during a food choice task. Results showed that the reaction time in unsuccessful restrained eaters (UREs) were greater than successful restrained eaters (SREs). The ERP results showed that SREs exhibited smaller N2 and greater P3 amplitudes than UREs, however, we did not find a difference in LPP amplitudes between the two groups. The findings suggest that the UREs demonstrated greater sensitivity and smaller inhibition to food cues, while we do not have supports for a difference in motivational and emotional salience. This is the first study that investigated the food choice of SREs and UREs when faced with different presentations of conflicting goals, which enriches the theoretical model and provides neural correlates evidence for future studies.
限制进食者是指有意识地遵循有限食物摄入饮食以减轻或维持体重的个体。随着肥胖病例的增加，限制进食作为一种应对肥胖的方法，越来越受到人们的青睐。双重冲突理论表明，限制进食者经常面临食物享受和体重管理之间的冲突选择。本研究探讨了不同体重管理目标呈现方式下的食物选择差异。研究假设在呈现冲突的食物/体重维持刺激时，成功的限制进食者和不成功的限制进食者的食物选择存在差异。共有 49 名大学生参与了这项研究，在一项食物选择任务中，研究人员调查了 N2、P3 和 LPP 事件相关电位（ERPs）。结果表明，不成功的限制进食者（UREs）的反应时间大于成功的限制进食者（SREs）。ERP 结果表明，SREs 的 N2 波幅较小，P3 波幅较大，而两组的 LPP 波幅没有差异。研究结果表明，UREs 对食物线索表现出更大的敏感性和更小的抑制，而我们没有发现两组之间在动机和情感显著性方面存在差异的证据。这是第一项研究，调查了 SREs 和 UREs 在面对不同冲突目标呈现时的食物选择，丰富了理论模型，并为未来的研究提供了神经相关证据。
