Dougherty Elizabeth N, Bottera Angeline R, Murray Matthew F, Ekwonu Adaora, Wildes Jennifer E, Haedt-Matt Alissa A
Department of Psychiatry and Behavioral Neuroscience, University of Chicago, Chicago, IL, USA.
Department of Psychology, University of Kansas, Lawrence, KS, USA.
Eur Eat Disord Rev. 2025 Jan;33(1):10-19. doi: 10.1002/erv.3126. Epub 2024 Jul 12.
Evidence suggests that interpersonal stress plays a role in maintaining binge eating and purging (e.g., self-induced vomiting, misuse of laxatives). Stress is especially likely to promote engagement in maladaptive behaviour if the behaviour is habitual; therefore, individuals whose binge eating and/or purging are habitual may be particularly likely to engage in these behaviours in the context of interpersonal stress. We aimed to investigate this hypothesis in a sample of women with binge eating and/or purging using ecological momentary assessment (EMA).
Women (N = 81) with binge-eating and/or purging symptoms completed a self-report measure assessing habit strength of binge eating and purging followed by a 14-day EMA protocol assessing daily perceived interpersonal stress and binge-eating and purging episodes.
Habit strength of purging moderated the within-person effect of interpersonal stress on purging frequency, such that higher daily stress was associated with greater same-day purging frequency when purging was more habitual. Contrary to expectations, the interactive effect of habit strength of binge eating and daily interpersonal stress on same-day binge-eating frequency was non-significant.
Findings suggest that individuals with habitual purging may be vulnerable to engaging in purging when they are experiencing high levels of interpersonal stress.
有证据表明人际压力在维持暴饮暴食和清除行为（如自我催吐、滥用泻药）方面起作用。如果某种行为是习惯性的，压力尤其可能促使人们采取适应不良的行为；因此，暴饮暴食和/或清除行为已成习惯的个体在人际压力情境下可能特别容易出现这些行为。我们旨在通过生态瞬时评估（EMA）对有暴饮暴食和/或清除行为的女性样本进行调查，以验证这一假设。
有暴饮暴食和/或清除症状的女性（N = 81）完成一项自我报告测量，评估暴饮暴食和清除行为的习惯强度，随后进行为期14天的EMA方案，评估每日感知到的人际压力以及暴饮暴食和清除发作情况。
清除行为的习惯强度调节了人际压力对清除频率的个体内部效应，即当清除行为更具习惯性时，每日压力越高，当日清除频率越高。与预期相反，暴饮暴食的习惯强度与每日人际压力对当日暴饮暴食频率的交互作用不显著。
研究结果表明，有习惯性清除行为的个体在经历高水平人际压力时可能容易出现清除行为。
