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  • Title: Scrupulosity and obsessive-compulsive symptoms: confirmatory factor analysis and validity of the Penn Inventory of Scrupulosity.
    Author: Olatunji BO, Abramowitz JS, Williams NL, Connolly KM, Lohr JM.
    Journal: J Anxiety Disord; 2007; 21(6):771-87. PubMed ID: 17250990.
    Abstract:
    The current study examined scrupulosity in 352 unselected college students as measured by the 19-item Penn Inventory of Scrupulosity (PIOS). Confirmatory factor analysis yielded support for a two-factor model of the 19-item PIOS. However, item-level analyses provided preliminary support for the validity of a 15-item PIOS (PIOS-R) secondary to the removal of items 2, 6, 15, and 10. The two domains of scrupulosity identified on the PIOS-R consisted of the Fear of Sin and the Fear of God. Both domains and total scrupulosity scores were strongly related to obsessive-compulsive symptoms. Scrupulosity also showed significant, but more modest correlations with a broad range of other measures of psychopathology symptoms (i.e., state anxiety, trait anxiety, negative affect, disgust sensitivity, specific fears). However, only obsessive-compulsive symptoms and trait anxiety contributed unique variance to the prediction of scrupulosity. Examination of specific obsessive-compulsive symptom dimensions revealed that only obsessions contributed unique positive variance to the prediction of Fear of God. However, OCD obsessions, washing, and hoarding symptoms contributed unique positive variance to the prediction of Fear of Sin. These findings are interpreted in the context of future research elucidating the relationship between scrupulosity and obsessive-compulsive symptom dimensions.
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