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The Yale-Brown Obsessive Compulsive Scale - University of ...

The Yale-Brown Obsessive Compulsive Scale - University of ...

The Yale-Brown Obsessive Compulsive Scale - University of

Anxiety Disorders19 (2005) 573–585The Yale-Brown Obsessive Compulsive Scale:factor analysis, construct validity, andsuggestions for refinementBrett J. Deacon, Jonathan S. Abramowitz *,1Department of Psychiatry & Psychology, Mayo Clinic, 200 First St. SW,Rochester, MN 55905, USAReceived 5 January 2004; received in revised form 21 April 2004; accepted 29 April 2004AbstractThe Yale-Brown Obsessive Compulsive Scale (Y-BOCS) is widely acknowledged asthe gold standard measure of obsessive–compulsive disorder (OCD) symptom severity.Despite its popularity, a number of questions remain regarding the Y-BOCS’ psychometricproperties including: (a) whether obsessional and compulsive symptoms contributeindependently to global OCD severity and (b) whether the Y-BOCS subscales are validwith respect to other measures of OCD. We examined these issues in a sample of 100patients with a diagnosis of OCD. While our confirmatory factor analyses failed toreproduce any previously reported models of the Y-BOCS factor structure, exploratoryfactor analysis indicated a two-factor solution that assessed symptom severity (i.e., time,distress, and interference from obsessions and compulsions) as separate from resistanceand control of obsessions and compulsions. In contrast to the Resistance/Control Subscale,the Severity Subscale demonstrated good psychometric properties and construct validity.Based on our findings we recommend revisions to scoring the Y-BOCS.# 2004 Elsevier Inc. All rights reserved.Keywords: Yale-Brown Obsessive Compulsive Scale; Factor analysis; Psychometric properties;Obsessive–compulsive disorder* Corresponding author. Tel.: þ1 507 284 4431; fax: þ1 507 284 4345.E-mail address: abramowitz.jonathan@mayo.edu (J.S. Abramowitz).1 Present address: Department of Psychology, P.O. Box 3415, University of Wyoming, Laramie,WY 82070, USA.0887-6185/$ – see front matter # 2004 Elsevier Inc. All rights reserved.doi:10.1016/j.janxdis.2004.04.009

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