Obsessive-Compulsive Inventory – OCI
A 42-item self-report questionnaire designed to assess the presence and distress levels of obsessive-compulsive symptoms across multiple dimensions.
Scale Development & Technical Details
Scale Overview
The Obsessive-Compulsive Inventory – OCI was developed by Edna B. Foa, Michael J. Kozak, Michael J. Salkovskis, Jonathan D. Coles, Nader Amir (1998). It is designed to measure Obsessive-Compulsive Disorder Symptoms. The scale is intended for use with Adults.
Scale Structure
This instrument consists of 42 items organized into 7 factors/subscales: Washing, Checking, Doubting, Ordering, Obsessing, Hoarding, Mental Neutralizing.
| Factor / Subscale | Items | N |
|---|---|---|
| Washing | 2,4,8,21,22,27,38,42 | 8 |
| Checking | 7,9,10,19,32,40 | 6 |
| Doubting | 3,5,12,24,26,37,41 | 7 |
| Ordering | 14,15,23,31,35 | 5 |
| Obsessing | 1,13,17,20,28,30,33 | 7 |
| Hoarding | 6,11,34 | 3 |
| Mental Neutralizing | 16,18,25,29,36,39 | 6 |
Response Format
Respondents rate each item using a custom response format.
Response anchors: 0 = Not at all, 1 = A little, 2 = Moderately, 3 = A lot, 4 = Extremely.
Scoring
Items are scored by subscale, with each subscale sum representing a distinct dimension.
Total scores range from 0 to 168. Interpretation guidelines:
- Subclinical: 0 – 41
- Clinically Significant OCD Symptoms: 42 – 168
Psychometric Properties
Internal Consistency: The scale has demonstrated good to excellent internal consistency with reported Cronbach’s alpha values of High internal consistency (Cronbach's alpha typically > 0.85).
Administration
The scale is self-administered and typically takes approximately 10 minutes to complete. It can be administered individually or in group settings. No special training is required for administration.