Abstract：
BACKGROUND: Understanding the emotional context of feeding behavior may help identify causal mechanisms of food avoidance among individuals with anorexia nervosa. Although predominant food avoidance models assume fear of fat drives feeding behavior, disgust may be more theoretically and proximally relevant to moment-to-moment experiences of feeding. This study, therefore, aimed to examine affect and food avoidance using automated affect analysis from facial response by measuring time-specific transitions in disgust during a laboratory eating paradigm. We hypothesized that phase transitions in disgust would distinguish temporally self-initiated eating from food avoidance.
METHODS: Sixty-three adolescents with anorexia nervosa or another low-weight eating disorder (LWED) and 27 age- and sex-matched controls were recruited as part of a larger study; 45 patients and 22 controls provided data on autonomous eating and facial affect during a laboratory meal. Dynamic structural equation models quantified moment-to-moment relationships between disgust and feeding behavior.
RESULTS: Self-initiated eating was associated with greater increases in disgust, but not fear, intensity among those with LWED relative to control participants and greater disgust intensity predicted lower likelihood of self-initiated eating.
CONCLUSIONS: Phasic transitions in disgust provide moment-to-moment evidence of affective influence on self-initiated eating and lend credibility to the hypothesis that disgust contributes to food avoidance and initiation in individuals with LWED.
METHODS: Sixty-three adolescents with anorexia nervosa or another low-weight eating disorder (LWED) and 27 age- and sex-matched controls were recruited as part of a larger study; 45 patients and 22 controls provided data on autonomous eating and facial affect during a laboratory meal. Dynamic structural equation models quantified moment-to-moment relationships between disgust and feeding behavior.
RESULTS: Self-initiated eating was associated with greater increases in disgust, but not fear, intensity among those with LWED relative to control participants and greater disgust intensity predicted lower likelihood of self-initiated eating.
CONCLUSIONS: Phasic transitions in disgust provide moment-to-moment evidence of affective influence on self-initiated eating and lend credibility to the hypothesis that disgust contributes to food avoidance and initiation in individuals with LWED.
摘要：
背景：了解进食行为的情绪背景可能有助于确定神经性厌食症患者避免进食的因果机制。尽管主要的食物回避模型假设对脂肪的恐惧会驱动喂养行为，厌恶在理论上可能更多，也更接近于每时每刻的进食体验。这项研究,因此,旨在通过测量实验室饮食范式中厌恶的特定时间转变，使用面部反应的自动情感分析来检查情感和食物回避。我们假设厌恶的相变将区分暂时的自我进食与避免进食。
方法：招募了63名患有神经性厌食症或其他低体重饮食障碍（LWED）的青少年和27名年龄和性别匹配的对照作为一项更大研究的一部分；45名患者和22名对照提供了实验室餐期间自主饮食和面部影响的数据。动态结构方程模型量化了厌恶和进食行为之间的时刻关系。
结果：自发进食与厌恶增加有关，但不要害怕，LWED患者相对于对照参与者的强度和更大的厌恶强度预测自我开始进食的可能性较低.
结论：厌恶的阶段性转变提供了情感影响自发进食的即时证据，并为以下假设提供了可信度：厌恶有助于LWED患者避免进食和开始进食。
方法：招募了63名患有神经性厌食症或其他低体重饮食障碍（LWED）的青少年和27名年龄和性别匹配的对照作为一项更大研究的一部分；45名患者和22名对照提供了实验室餐期间自主饮食和面部影响的数据。动态结构方程模型量化了厌恶和进食行为之间的时刻关系。
结果：自发进食与厌恶增加有关，但不要害怕，LWED患者相对于对照参与者的强度和更大的厌恶强度预测自我开始进食的可能性较低.
结论：厌恶的阶段性转变提供了情感影响自发进食的即时证据，并为以下假设提供了可信度：厌恶有助于LWED患者避免进食和开始进食。
