The Vancouver Obsessional Compulsive Inventory-2 (VOCI-2)

Since the publication of the original Vancouver Obsessional Compulsive Inventory (VOCI), a large body of evidence demonstrating the prevalence and importance of newer symptom domains in obsessive-compulsive disorder (OCD) (e.g. mental contamination, reassurance seeking, and symmetry, ordering, and arranging) has emerged. Although the VOCI has excellent psychometric properties, these developments point to the need for a revision. The present study aimed to revise the VOCI to provide a brief and up-to-date measure to assess OCD symptomatology. The development of the VOCI-2 is discussed, along with information about its reliability, validity and factor structure. An exploratory factor analysis was conducted on data obtained from 1108 non-clinical participants who completed the VOCI, the Vancouver Obsessional Compulsive Inventory – Mental Contamination Scale (VOCI-MC), the Symmetry Ordering and Arranging Questionnaire (SOAQ), and the Covert and Overt Reassurance Seeking Inventory (CORSI) to arrive at an updated measure, and clinical samples (primary diagnosis of OCD, n =59; anxious controls, n =42; depressed controls, n =18) completed the VOCI-2 to assess known-groups validity. The VOCI-2 consists of six distinctive factors reflecting symptom categories: Symmetry, Ordering and Arranging; Reassurance Seeking; Checking; Mental Contamination; Obsessions; and Contact Contamination. The updated questionnaire is characterized by strong reliability and validity, face valid items and subscales, is easy to administer and reflects a current understanding of the heterogeneous presentations of OCD. Future directions include additional validation in larger clinical samples and in other (e.g. treatment) contexts.