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Treatment of Monozygotic Twins with Obsessive Compulsive Disorder Using Cognitive Therapy and Exposure with Ritual Prevention

Published online by Cambridge University Press:  29 June 2009

Michael P. Twohig ,
Maureen L. Whittal  and
Katherine A. Peterson
Michael P. Twohig*
Affiliation:
Utah State University, Logan, USA
Maureen L. Whittal
Affiliation:
University of British Columbia and UBC Hospital, Vancouver, Canada
Katherine A. Peterson
Affiliation:
Utah State University, Logan, USA
*
Reprint requests to Michael P. Twohig, Utah State University, 2810 Old Main Hill, Logan, UT 84322, USA. E-mail: michael.twohig@usu.edu An extended version of the measures section, description of participants, and treatment procedures is available in the table of contents for this issue: http://journals.cambridge.org/jid_BCP or from the authors.
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Abstract

Background: Assessment and treatment of cohabiting monozygotic (MZ) twins with obsessive compulsive disorder (OCD) is a possible challenge for clinical psychologists. Aims: This study aims to present a detailed history of two sets of cohabiting MZ twins with OCD, and describe the adaption of cognitive behavior therapy in their treatments. Method: Two sets of cohabiting MZ twins completed a structured intake and the Yale Brown Obsessive Compulsive Scale as well as measures of depression, anxiety, a measure of obsessive beliefs, and thought action fusion. One set received cognitive behavior therapy and exposure with ritual prevention (ERP) simultaneously and the other received ERP separately. Pre-, post-treatment and follow-up assessments occurred for both sets of twins. Results: All four individuals showed notable decreases in OCD, and results were maintained for three of the four participants at follow-up points. Conclusions: This study highlights the developmental course of OCD that can occur in cohabiting twins, and the clinical adaption that may be necessary.

Keywords

OCDcognitive therapytreatment outcomeexposure and response prevention
Type
Brief Clinical Reports
Information
Behavioural and Cognitive Psychotherapy , Volume 37 , Issue 4 , July 2009 , pp. 475 - 480
Copyright
Copyright © British Association for Behavioural and Cognitive Psychotherapies 2009

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