Summers Berta J, Cougle Jesse R
Department of Psychology, Florida State University, Tallahassee, FL, USA.
Department of Psychology, Florida State University, Tallahassee, FL, USA.
Behav Res Ther. 2016 Dec;87:117-127. doi: 10.1016/j.brat.2016.09.005. Epub 2016 Sep 15.
Individuals meeting diagnostic criteria for body dysmorphic disorder (BDD; N = 40) were enrolled in a randomized, four-session trial comparing interpretation bias modification (IBM) training designed to target social evaluation- and appearance-related interpretation biases with a placebo control training condition (PC). Sessions took place over the course of two weeks (two sessions per week). Analyses indicated that, relative to the PC condition, IBM led to a significant increase in benign biases and reduction in threat biases at post-treatment. IBM also led to greater reductions in BDD symptoms compared to PC, though this effect was present at high but not low levels of pre-treatment BDD symptoms. Additionally, compared to PC, IBM led to lower urge to check and lower fear in response to an in vivo appearance-related stressor (having their picture taken from different angles), though the latter effect was present only among those reporting elevated fear at pre-treatment. The effects of treatment on interpretation biases and BDD symptoms were largely maintained at a one-month follow-up assessment. Moderated-mediation analyses showed that change in threat bias mediated the effect of condition on post-treatment symptoms for individuals high in pre-treatment BDD symptoms. The current study provides preliminary support for the efficacy of IBM for BDD.
符合身体变形障碍（BDD；N = 40）诊断标准的个体参加了一项随机的四节试验，该试验比较了旨在针对与社会评价和外貌相关的解释偏差的解释偏差修正（IBM）训练与安慰剂对照训练条件（PC）。课程在两周内进行（每周两节）。分析表明，相对于PC条件，IBM导致治疗后良性偏差显著增加，威胁偏差减少。与PC相比，IBM还导致BDD症状有更大程度的减轻，尽管这种效果在治疗前BDD症状水平高时存在，而在低水平时不存在。此外，与PC相比，IBM导致在面对与外貌相关的现场应激源（从不同角度拍照）时检查的冲动和恐惧更低，尽管后一种效果仅在治疗前报告恐惧升高的人群中存在。治疗对解释偏差和BDD症状的影响在一个月的随访评估中基本保持。调节中介分析表明，对于治疗前BDD症状高的个体，威胁偏差的变化介导了条件对治疗后症状的影响。本研究为IBM治疗BDD的疗效提供了初步支持。
