Hughes Mari Laura, Hamill Michelle, van Gerko Karen, Lockwood Rebecca, Waller Glenn
South West London and St. George's Mental Health NHS Trust, United Kingdom.
Eat Behav. 2006 May;7(2):125-33. doi: 10.1016/j.eatbeh.2005.09.001. Epub 2005 Oct 13.
Both disorder-specific cognitions and unconditional core beliefs have been associated with eating-disordered behaviours. This study examines whether these beliefs might provide competing or complementary explanations of those behaviours.
The participants were 151 women with eating disorders. Each woman completed two self-report measures-the Eating Disorder Examination Questionnaire (measuring disorder-specific cognitions and reported behavioural frequency) and the Young Schema Questionnaire-Short version (measuring unconditional core beliefs). Objective height and weight were measured to give body mass index (BMI). Regression analyses were used to compare additive, mediator and moderator models of the cognition-behaviour link.
BMI and reported frequency of vomiting were best explained by models where the impact of disorder-specific cognitions was moderated by unhealthy core beliefs, but where neither form of belief had an independent effect. In contrast, the frequency of reported objective binge-eating was best explained by an additive effect of the two forms of cognition.
The findings indicate that both disorder-specific cognitions and unconditional core beliefs are necessary to explain the development and maintenance of disordered eating behaviours. This conclusion suggests that cognitive-behavioural approaches might be more effective if they address both levels of cognition. However, prospective research is required to confirm the causal hypothesis based on the present cross-sectional data.
特定障碍认知和无条件核心信念均与饮食失调行为相关。本研究探讨这些信念是否能为这些行为提供相互竞争或互补的解释。
参与者为151名患有饮食失调症的女性。每位女性完成两项自我报告测量——饮食失调检查问卷（测量特定障碍认知和报告的行为频率）和青少年图式问卷简版（测量无条件核心信念）。测量客观身高和体重以得出体重指数（BMI）。采用回归分析比较认知 - 行为联系的相加、中介和调节模型。
BMI和报告的呕吐频率在特定障碍认知的影响由不健康核心信念调节、但两种信念形式均无独立效应的模型中得到最佳解释。相比之下，报告的客观暴饮暴食频率在两种认知形式的相加效应模型中得到最佳解释。
研究结果表明，特定障碍认知和无条件核心信念对于解释饮食失调行为的发展和维持都是必要的。这一结论表明，如果认知行为方法能同时针对两个认知层面，可能会更有效。然而，需要前瞻性研究来基于当前横断面数据证实因果假设。
