Obsessive Compulsive Inventory – Revised (OCI-R)
Recommended frequency: Every 4 weeks
The Obsessive Compulsive Inventory (“OCI-R”) is an 18-item self-report scale for OCD. The OCI-R is a shorter version than the OCI (Fao et al., 1998). Even though the OCI-R has only 18 items, it retains many of the qualities of the OCI. It was found to have good to excellent internal consistency, test–retest reliability, and convergent validity. Each item is scored on a 5-point scale (0-4 points), and the total score is the sum of the scores on all items. According to the authors, people with OCD typically have a score of 21 points and higher.
In an initial study, results suggest the OCI-R is sensitive to treatment effects and that pre- to posttest change on this instrument reflects improvement in OCD and related symptoms of depression, anxiety, and global functioning. The OCI-R was not sensitive to improvement in patients’ insight into the senselessness of their OCD symptoms.
In a further study, confirmatory factor analysis confirmed a six-factor solution. The instrument also evidenced good convergent validity, and performed well in discriminating OCD from other anxiety disorders. Theoretically consistent patterns of associations between OCI-R symptom-based subscales and OCD-related cognitive variables were found, and five of the six OCI-R subscales corresponded closely to identified OCD symptom dimensions. The OCI-R is recommended as an empirically validated instrument that can be used in a range of clinical and research settings for research on OCD.
The following statements refer to experiences that many people have in their everyday lives. Select the number that best describes HOW MUCH that experience has DISTRESSED or BOTHERED you during the PAST MONTH.
Scores on the OCI-R are generated by adding each of the item scores. The possible range of scores is from 0-72. The mean score for persons with OCD is 28.0 (with a standard deviation of 13.53). The recommended cut-off score is 21, with scores at or above this level indicating the likely presence of OCD.
Foa, E.B., Huppert, J.D., Leiberg, S., Hajcak, G., Langner, R., et al. (2002). The Obsessive Compulsive Inventory: Development and validation of a short version. Psychological Assessment, 14, 485-496.