The Clark-Beck Obsessive-Compulsive Inventory (C-BOCI): Validation for their use in Spanish populations

Abstract

The Clark-Beck Obsessive-Compulsive Inventory (C-BOCI) is a recent self-administered inventory (Clark y Beck, 2002), designed to offer a valid, specific and reliable tool for the screening of Obsessive-Compulsive Disorder (OCD): it assesses symptoms and their consequences, and takes into account the assumptions of current cognitive models about the disorder.  The aim of this study has been to examine the usefulness of the C-BOCI in a Spanish population. The questionnaire was completed together with other OCD, depression, and anxiety instruments by 506 adults without mental disorders and 44 OCD patients. The α values were ≥0.80 except for the obsessions subscale in the clinical sample. Concurrent and discriminant validity were adequate, especially for the total score (TS) and the compulsions subscale.  Criterion validity was calculated by the positive and negative predictive values (PPV, PNV) of several TS cut-off points. Total scores ≥ 30 (PPV= 100%; PNV= 99.02%) indicate a clinical OCD diagnosis.