Interpretation Bias Modification for Body Dysmorphic Disorder

Florida State University

Status: Completed

Conditions: Body Dysmorphic Disorder

Treatments: Behavioral: Interpretation Bias Modification; Behavioral: Progressive Muscle Relaxation

Study type: Interventional

Funder types: Other

Identifiers

NCT02635152

2017.20244

Details and patient eligibility

About

The purpose of this study is to determine whether a computerized intervention designed to reduce appearance and evaluation related interpretation biases will reduce symptoms associated with body dysmorphic disorder.

Full description

The present study aims to examine the feasibility of a remote treatment for body dysmorphic disorder delivered via the Internet. To evaluate the efficacy of the IBM protocol we have developed in reducing negative appearance and evaluative related interpretations, we will conduct a two-arm randomized controlled trial over the internet. Individuals with a diagnosis of body dysmorphic disorder (N = 40) will be randomized to one of two conditions: 1) IBM or 2) progressive muscle relaxation. Each condition will consist of eight 10-25 minute treatment sessions. Participants will complete two sessions per week for four weeks and will be administered assessments at pre-treatment, one week post-treatment and at 3-month follow-up. We hypothesize that: 1) IBM will lead to greater reductions in BDD symptoms than the PMR condition; 2) IBM will lead to greater reductions in depression, anxiety and suicidal ideation than the PMR condition; 3) IBM will lead to greater reductions in threat interpretations and greater increases in benign interpretations than the PMR condition; 4) The effects of condition on BDD symptoms will be mediated by changes in BDD-related interpretation bias; and 5) The effects of training in the IBM condition will be maintained at the 3-month follow-up assessments.

Enrollment: 50 patients

Sex: All

Ages: 18 to 65 years old

Volunteers: No Healthy Volunteers

Inclusion criteria

• Current diagnosis of Body Dysmorphic Disorder according to DSM-5 criteria
• BDD-YBOCS score greater than or equal to 20
• Fluent in English
• No significant physical defect or flaw in appearance (e.g., disfiguration)

Exclusion criteria

• History of psychotic disorder, bipolar disorder, borderline personality disorder
• Current substance use disorder
• Unstable medication status (i.e. change in medication within the last month)
• Concurrent psychotherapy for appearance concerns
• Active and clinically significant suicidality

Trial design

Primary purpose: Treatment

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: Single Blind

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50 participants in 2 patient groups

Interpretation Bias Modification (IBM)

Experimental group

Description:

Treatment consists of eight brief sessions. In Task 1, participants read unique scenarios ("You notice someone pointing in your direction"). A sentence meant to resolve the ambiguity will appear ("This person thinks they reco_nize you"). After filling in the missing letter, the interpretation is reinforced by requiring the participants to correctly answer "yes" or "no" to a comprehension question ("Is this person mocking you?"). In Task 2, participants are shown a word denoting a threatening ("mocking") or benign ("cheerful") interpretation. Participants are presented with an ambiguous scenario ("You hear people at a nearby table laughing") and asked to denote whether the word and the sentence are related. Participants will receive positive or negative feedback based on their response.

Treatment:

Behavioral: Interpretation Bias Modification

Progressive Muscle Relaxation (PMR)

Active Comparator group

Description:

Participants will receive eight brief sessions of PMR. They will listen to a PMR script (Kassinove \& Tafrate, 2002). Participants will be asked to make sure they are sitting comfortably, close their eyes, and systematically tense and release 10 different muscle groups.

Treatment:

Behavioral: Progressive Muscle Relaxation