Psychometric Properties of the Persian Version of the Inventory of Statements about Self-injury (ISAS)

Abstract

Background: Non-suicidal self-injury (NSSI) is a serious public health problem with increasing prevalence among adolescents and young adults. The present study examines the factor structure, internal consistency, and validity of the Inventory of Statements About Self-injury (ISAS), a self-report measure designed to comprehensively assess non-suicidal self-injury (NSSI). Methods: A total of 655 Iranian school-attending adolescents completed study measures online. A total of 246 (37.70%) (M age = 15.38, SD ± .50; 53% female) respondents reported a history of NSSI at least once during their lifetime. Results: Confirmatory factor analysis supported the proposed two-factor model of ISAS (i.e., Interpersonal and Intrapersonal dimensions). ISAS dimensions had good internal consistency and yielded direct associations with converging correlates (e.g., depression, anxiety, irritability, and anger). Conclusions: Findings indicated that the Persian version of the ISAS has sound psychometric properties and is a valid and reliable self-report measure of NSSI.