epidemiological studies typically suggest a lifetime prevalence of obsessive-compulsive disorder (ocd) in approximately 2% to 3% of adults (ruscio, stein, chiu, & Kessler, 2010;Weissman, bland, canino, & greenwald, 1994). ocd tends to follow a chronic course (leckman et al., 2010), being unlikely to remit without treatment (houghton, saxon, bradburn, ricketts, & hardy, 2010). Adults with ocd report high rates of impairment in work, role (mancebo et al., 2008), and social functioning (huppert, simpson, nissenson, liebowitz, & Foa, 2009).Although the fifth edition of the Diagnostic and Statistical Manual of Mental Disorders (DSM-5; American Psychiatric Association, 2013) allows the diagnosis to be made in the presence of either obsessions or compulsions, the vast majority of individuals with ocd present with both (Foa et al., 1995). obsessions and compulsions tend to cluster into commonly occurring dimensions, with the most common dimensions reflecting (a) fears of Copyright American Psychological Association. Not for further distribution.