Padua Inventory – Washington State University Revision (PI-WSUR)
Measures the severity of obsessive-compulsive disorder (OCD) symptoms across multiple cognitive and behavioral dimensions.
Scale Development & Technical Details
Scale Overview
The Padua Inventory – Washington State University Revision (PI-WSUR) was developed by G. Leonard Burns, S. Keortge, G. Formea, & L.G. Sternberger (1996). It is designed to measure Obsessive-Compulsive Disorder (OCD) symptoms. The scale is intended for use with Adults.
Scale Structure
This instrument consists of 39 items organized into 5 factors/subscales: Contamination obsessions and washing compulsions, Dressing/grooming compulsions, Checking compulsions, Obsessional thoughts of harm to self/others, Obsessional impulses to harm self/others.
| Factor / Subscale | Items | N |
|---|---|---|
| Contamination obsessions and washing compulsions | 1,2,3,4,5,6,7,8,9,10 | 10 |
| Dressing/grooming compulsions | 11,12,13 | 3 |
| Checking compulsions | 14,15,16,17,18,19,20,21,22,23 | 10 |
| Obsessional thoughts of harm to self/others | 24,25,26,27,28,29,30 | 7 |
| Obsessional impulses to harm self/others | 31,32,33,34,35,36,37,38,39 | 9 |
Response Format
Respondents rate each item using a custom response format.
Response anchors: 0 = Not at all, 1 = A little, 2 = Quite a lot, 3 = A lot, 4 = Very much.
Scoring
Items are scored by subscale, with each subscale sum representing a distinct dimension.
Total scores range from 0 to 156. Interpretation guidelines:
- Minimal OCD symptoms: 0 – 39
- Mild to Moderate OCD symptoms: 40 – 78
- Moderate to Severe OCD symptoms: 79 – 117
- Severe OCD symptoms: 118 – 156
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 > .90 for total scale).
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.