Objective: Appearance-related safety behaviors (SBs; e.g., mirror checking, grooming) have been implicated in body dysmorphic disorder (BDD), eating disorders, and social anxiety disorder. The proposed project aimed to extend previous research efforts by exploring the experimental effects of reducing engagement in appearance-related SBs on appearance concerns and related symptoms. Method: Eighty-four undergraduate female participants with elevated appearance concerns were randomly assigned to a SB fading group or a no instructions control group. For 2 weeks, participants in the SB fading condition were sent daily reminders via text message to decrease their engagement in appearance-related SBs, whereas participants in the control group completed assessments only. Self-report assessments of study variables of interest were administered at baseline, midmanipulation, postmanipulation, and 2-week follow-up. Participants also completed an appearance-related in vivo stressor task at post, during which participants rated their reactivity to having their photographs taken from various angles. Results: Compared to the control group, the SB fading group exhibited significantly lower social anxiety, BDD symptoms, body dissatisfaction, and maladaptive cognitions at the postmanipulation and follow-up assessments. SB fading had stronger effects on BDD symptoms at postmanipulation among those high versus those low in baseline BDD symptoms. The SB fading group also showed less reactivity to some aspects of the in vivo appearance-related stressor task. Conclusions: This study provides strong evidence for the importance of appearance-related SBs in the maintenance of BDD and other disorders characterized by body image disturbances. Findings point to the potential utility of decreasing appearance-related SBs as a transdiagnostic treatment strategy.

Objective: The current study extended upon previous research efforts by evaluating the utility and feasibility of an 8-session Internet-based interpretation bias modification (IBM) training protocol targeting evaluation- and appearance-related threat biases characteristic of the disorder compared to a progressive muscle relaxation (PMR) condition for treatment of body dysmorphic disorder (BDD). Method: Fifty participants with BDD were recruited from across the United States and randomly assigned to eight sessions of either IBM or PMR. Assessments of interpretation bias, BDD symptoms, depression, and anxiety were administered at pretreatment, 1-week posttreatment, and 3-month follow-up. Results: Compared to the PMR group, individuals in the IBM condition reported less negative/threat interpretation biases and greater positive/benign interpretation biases at posttreatment and follow-up. There were no significant differences between groups with regard to BDD symptoms, depression, or anxiety. Clinically significant improvement was common in both conditions (IBM = 64.0%; PMR = 52.0%), though it did not differ between them. Conclusions: Contrary to our hypothesis, IBM did not outperform PMR with regard to BDD symptom reduction, though both treatments yielded significant improvements on symptom outcomes. Findings suggest that IBM and/or PMR may be promising treatment strategies for BDD, perhaps adjunctively. Overall, these findings provide helpful future directions for IBM research and provide an additional lens through which to examine its potential effectiveness for BDD.

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