Obsessive-Compulsive Inventory-Revised (OCI-R)
Also known as: OCI-R, OCI
The Obsessive-Compulsive Inventory-Revised (OCI-R) is an 18-item self-report measure of obsessive-compulsive disorder (OCD) symptoms. Developed by Foa and colleagues in 2002, the OCI-R is a revised and shortened version of the original OCI. It assesses six dimensions of OCD: obsessing, hoarding, neutralizing, contamination, responsibility, and symmetry. The OCI-R has become the standard self-report outcome measure in OCD research and treatment trials.
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When to use it
The OCI-R is ideal for screening and assessing OCD in clinical and research settings. It is particularly valuable for monitoring treatment response during cognitive-behavioral therapy or pharmacotherapy. The instrument is less suitable as a diagnostic tool alone (clinical interview required) but excels at quantifying symptom severity and tracking change. The OCI-R is standard in OCD treatment trials.
Strengths & limitations
- Efficient 18-item format balances comprehensive coverage with practical brevity
- Six subscales capture the heterogeneity of OCD presentations, guiding treatment planning
- Strong psychometric properties with high internal consistency and test-retest reliability
- Highly sensitive to cognitive-behavioral therapy and pharmacotherapy effects in clinical trials
- Measures OCD symptom severity but does not provide diagnosis; clinical assessment required
- Self-report bias: patients may minimize or exaggerate symptoms based on perceived interviewer expectations
- Some individuals with OCD show minimal insight and may underreport symptoms
Frequently asked
What do the six OCI-R subscales measure?
Obsessing: unwanted intrusive thoughts. Hoarding: difficulty discarding items. Neutralizing: mental rituals and checking. Contamination: fear of contamination. Responsibility: excessive responsibility for harm. Symmetry: need for things to be 'just right.' Each subscale reflects a distinct OCD symptom dimension.
What OCI-R score indicates probable OCD?
A total OCI-R score above 21 (on the 0–72 scale) often suggests probable OCD, though cutoffs vary by study and population. Subscale elevation is also informative; predominant subscales guide treatment (e.g., high contamination responds well to exposure to contaminants).
Can the OCI-R distinguish OCD from anxiety disorders?
The OCI-R measures OCD-specific symptom dimensions but does not explicitly distinguish OCD from other anxiety disorders like generalized anxiety or panic disorder. Clinical assessment probing the nature of intrusions, rituals, and insight is needed to differentiate.
How sensitive is OCI-R to treatment effects?
The OCI-R is highly sensitive to cognitive-behavioral therapy (ERP) and pharmacotherapy effects. A reduction of 25–50% from baseline typically indicates clinically significant improvement. Session-by-session measurement can guide treatment adjustments.
Sources
- Foa, E. B., Huppert, J. D., Leiberg, S., Langner, R., Kichic, R., Hajcak, G., & Salkovskis, P. M. (2002). The Obsessive-Compulsive Inventory: Development and validation of a short version. Psychological Assessment, 14(4), 485-496. DOI: 10.1037/1040-3590.14.4.485 ↗
- Grisham, J. R., Fullana, M. A., Mataix-Cols, D., Moffitt, T. E., Caspi, A., & Foa, E. B. (2008). Risk factors prospectively associated with adult obsessive-compulsive symptoms: A comparison of two birth cohorts assessed at different life stages. American Journal of Psychiatry, 165(12), 1552-1560. link ↗
How to cite this page
ScholarGate. (2026, June 3). Obsessive-Compulsive Inventory-Revised (OCI-R). ScholarGate. https://scholargate.app/en/clinical-psychology/oci-r
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