An investigation of habit learning in Anorexia Nervosa
An investigation of habit learning in Anorexia Nervosa
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DOI：
10.1016/j.psychres.2016.07.051
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发表时间：
2016-10-30
影响因子：
11.3
通讯作者：
Park, Rebecca J.
中科院分区：
文献类型：
--
作者：
Godier, Lauren R.;de Wit, Sanne;Park, Rebecca J.
神经性厌食症(AN)是一种以强迫行为为特征的疾病，如自我饥饿和过度运动，这些行为在追求减肥的过程中发展起来。最近的理论表明，一旦确立，强迫性减肥行为可能会成为一种习惯。在两项平行的研究中，我们使用两项结果贬值任务来衡量AN患者是否表现出对习惯的偏见。在研究1中，23名患有限制性和暴饮暴食/清除亚型的女性和18名健康对照(HC)完成了旨在评估基于奖励的习惯的行动失误范例。在研究2中，13名患有限制性AN的女性、14名从限制性AN中康复的女性和17名女性HC参与者完成了旨在评估厌恶习惯的行动失误范式和回避范式。与HCS相比，AN参与者在使用反馈对刺激做出正确反应的能力方面没有缺陷。在结果贬值后，两项研究中的所有组都同样能够抑制不适当的反应，这表明在目标导向和习惯性控制这些任务中的行为之间的平衡方面没有缺陷。这些结果表明，在两项结果贬值任务中，AN患者并没有表现出依赖习惯的普遍倾向。未来的研究需要调查特定于障碍的习惯在维持行为方面的潜在作用。(C)爱思唯尔爱尔兰有限公司出版的2016年。
Anorexia Nervosa (AN) is a disorder characterised by compulsive behaviour, such as self-starvation and excessive exercise, which develop in the pursuit of weight-loss. Recent theory suggests that once established, compulsive weight-loss behaviours in AN may become habitual. In two parallel studies, we measured whether individuals with AN showed a bias toward habits using two outcome-devaluation tasks. In Study 1, 23 women with AN (restrictive and binge/purge subtypes), and 18 healthy controls (HC) completed the slips-of-action paradigm, designed to assess reward-based habits. In Study 2, 13 women with restrictive AN, 14 women recovered from restrictive AN, and 17 female HC participants completed the slips-of-action paradigm, and an avoidance paradigm, designed to assess aversive habits. AN participants showed no deficit relative to HCs in the ability to use feedback to respond correctly to stimuli. Following devaluation of outcomes, all groups in both studies were equally able to withhold inappropriate responses, suggesting no deficit in the balance between goal-directed and habitual control of behaviour in these tasks in AN. These results suggest that individuals with AN do not show a generalised tendency to rely on habits in two outcome-devaluation tasks. Future research is needed to investigate the potential role of disorder-specific habits in the maintenance of behaviour in AN. (C) 2016 Published by Elsevier Ireland Ltd.