Psychometric Properties and Factor Structure of the Behavior Problems Inventory in Iranian Elementary Students with Intellectual Disability

This study aimed to evaluate the psychometric properties and the factor structure of the Behavior Problems Inventory (BPI-01) among students with intellectual disabilities in Iran. The Persian version of BPI-01 was administered to the care staff of Iranian children and adolescents (n=591) who had been detected as suffering from intellectual disabilities. Iranian children and adolescents with intellectual disabilities in the present study lived in one of the 4 provinces of Tehran, Esfahan, Karaj, and Kurdistan. Cronbach α and confirmatory factor analysis (CFA) were used for analyzing the data. The results of the study showed that the scale could reach an acceptable level of internal consistency (Cronbach α ranged from 0.83 to 0.94). Furthermore, CFA supported the unidimensionality of the subscales as well as 3 factor structure proposed in the original BPI-01. The Persian version of BPI-01 enjoys an acceptable level of reliability and is explained by the same factor structure proposed in the original BPI-01. The limitations and some applications of the present study will be discussed too.