Psychometric properties of the persian version of the padua inventory: Washington state university revision (PI-WSUR)

Objective: the psychometric properties and factor structure of the persian padua inventory washington state university revision (pi-wsur),a measure of obsessive-compulsive phenomena,was examined in a non-clinical sample of 348 iranian university students. method: the pi-wsur was translated into persian,and its back translation was controlled by the author inventory. a pilot study based on cultural differences was carried out on twenty students. the study subjects consisted of 348 university students,and they completed ppi,oci-r,moci,bai,stai,bdi-ii and the demographic inventory. results: the factor analysis of the pi-wsur,exhibited eight factors similar but not identical with factor structure in previous studies. as the eight factors are as follows: contamination obsessions; washing compulsions; ordering compulsions; checking compulsions; obsessional thoughts to harm self/others; obsessional thoughts about violence; obsessional impulses to harm self/others; and obsessional impulses to steal. the result also indicated excellent internal consistency (cronbach alpha= 0.92),spearman split test (0.95) and test-retest (r= 0.77). we assessed the concurrent validity of the ppi in relation to the obsessive compulsive inventory-revised (oci-r),and the maudsley obsessive-compulsive inventory (moci). conclusion: the iranian version of the pi to some extend remains the sound psychometric properties of the original version.