Yale-Brown Obsessive Compulsive Scale

The Yale-Brown Obsessive Compulsive Scale (Y-BOCS) is a structured, clinician-rated assessment for use in determining the presence and severity of symptoms of obsessive-compulsive disorder (OCD). The Y-BOCS consists of a symptom checklist and five-item rating scales for both obsessions and compulsions, which are summed to produce a total score. The Y-BOCS has consistently demonstrated excellent psychometric properties and has been used extensively in research studies as both a screening or diagnostic tool and an outcome measure. As a result, among measurement tools for evaluating OCD, the Y-BOCS is considered the gold standard.

At the time of the Y-BOCS development in the late 1980s, existing measures of obsessive-compulsive symptoms were limited in their reliability and validity due to their design or breadth. As such, the authors of ...

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