COMPULSIVE ACTIVITY CHECKLIST AND THE MAUDSLEY OBSESSIONAL-COMPULSIVE INVENTORY - PSYCHOMETRIC PROPERTIES OF 2 MEASURES OF OBSESSIVE-COMPULSIVE DISORDER

The psychometric properties of two measures of obsessive-compulsive symptoms are described in this study. The Compulsive Activity Checklist (CAC) and the Maudsley Obsessional-Compulsive Inventory (MOCI) were administered to a nonclinical American sample of 579 college students. Original American norms are presented for the CAC and the MOCI. Both measures demonstrated good internal consistency and testretest stability over a 6-7 month interval. Principal components analysis extracted three CAC factors: washing, checking and personal hygiene. Four factors were extracted for the MOCI: washing, checking, doubting and strictness. Both measures showed good convergent and divergent validity with the nine subscales of the SCL-90-R, though the results were slightly stronger for the MOCI. The results also provide additional evidence that the CAC and MOCI are measuring different aspects of obsessivecompulsive symptoms. © 1990 Association for Advancement of Behavior Therapy. All rights reserved.