#3267. A Reliability Generalization Meta-analysis of the Padua Inventory-Revised (PI-R)

October 2026publication date
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Journal’s subject area:
Arts and Humanities (miscellaneous);
Clinical Psychology;
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Abstract:
The Padua Inventory-Revised (PI-R) is a widely applied instrument to measure obsessive-compulsive symptoms in clinical and nonclinical samples. The research conducted a reliability generalization meta-analysis on the PI-R. Method: An exhaustive literature search yielded 118 empirical studies that had applied the PI-R, from which 30 studies (33 samples) reported an original reliability estimate. Assuming a random-effects model, the average internal consistency reliability (Cronbachs alpha) was .92 for the total scores, and ranged from .74 to .89 for the subscales. Assuming mixed-effects models, moderator analyses showed a positive statistically significant association between the standard deviation of the total scores and the reliability coefficients. Conclusions: In terms of reliability, the PI-R scale was found to be adequate for both research and clinical purposes, although exhibiting large heterogeneity across studies.
Keywords:
Alpha coefficient; Assessment; Obsessive-compulsive; Systematic review; Test-retest

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