Psychologists' Diagnostic Accuracy and Treatment Recommendations for Obsessive‐Compulsive Disorder

Obsessive-compulsive disorder (OCD) is a debilitating condition prevalent in up to 2.3% of the population, yet obsessive-compulsive symptoms are commonly misidentified by mental health professionals, adversely impacting treatment recommendations. This study examined OCD misidentification rates across two different types of obsessions, the influence of misidentification on treatment recommendation, and attitudes associated with clinicians' decisions surrounding the diagnosis of OCD and treatment recommendations in a sample of 110 licensed psychologists. Results showed that over one-third (35.0%) of participants incorrectly diagnosed two vignettes, representing symptoms of sexual orientation OCD (SO-OCD) and symmetry. Of those who correctly diagnosed the vignettes, about half of participants (symmetry = 55.4%; SO-OCD = 47.1%) recommended exposure and response prevention (ERP) as the primary treatment choice. Participants who endorsed greater client empowerment were more likely to misdiagnose the SO-OCD vignette (t(108) = 2.97, p = 0.004). Less experience with evidence-based practice and negative attitudes toward evidence-based practice were associated with the choice of treatment other than ERP (t(71) = -2.98, p = 0.004 and t(72) = 3.40, p < 0.001, respectively). Elevated OCD misdiagnosis and its adverse impact on treatment recommendations, as well as knowledge of factors contributing to misdiagnosis and mistreatment, imply the need for greater education and training.