Factor Structure and Psychometric Properties of the Persian Version of Vancouver Obsessional Compulsive Inventory- Mental Contamination Scale (VOCI-MC)

The Vancouver Obsessional Compulsive Inventory–Mental Contamination Scale (VOCI-MC) is a self-report instrument that assesses symptoms of mental contamination. The aim of this study was to investigate the psychometric properties of the Persian version of the VOCI-MC in non-clinical sample. Factor structure, convergent validity, internal consistency and temporal stability were investigated in 391 participants of general population of Shahed University, students. Results showed that Persian version of VOCI-MC had a good internal consistency and test- retest reliability. Also, convergence of this scale with OCD scores of Padoa Inventory was good. The Exploratory factor analysis showed four factors. The Confirmatory factor analysis confirmed four factors structure better fit than one factor structure. These findings suggest that the Persian version of the VOCI-MC had the adequate psychometric properties in general population. Therefore, it can be confidently used as an assessment tool of mental contamination symptoms and research settings too.