Psychometric Properties of Persian version of The security in the Interparental Subsystem Scales (SIS)

The purpose of this study was to prepare a Persian version of the Security in the Inter-Parental Subsystem scales (SIS), and to examine its psychometric properties in the Iranian adolescent community. The English version of the SIS questionnaire was translated and back-translated prior to its administration to 587 students (269 boys and 318 girls) from the first and second grades of high school in Shiraz at 2019-2020. After administration, the internal consistency coefficient (Cronbach's alpha) was calculated to validate the subscales and also exploratory and confirmatory factor analysis was assessed to examine the factor structure and validation of the questionnaire. In examining the factor structure of this questionnaire, 9 factors were extracted using the exploratory factor analysis method, which explained 57.8% of the variance The results of confirmatory factor analysis also indicated aد acceptable fit of the 9-factor model. The range of alpha coefficients in the girls group was between 0.34 to 0.82, in the boys group between 0.20 to 0.80 and in the whole scale was between 0.29 to 0.80. According to the results of the study, the Persian version of the Security in the interparental subsystem scales has good reliability and validity in Iranian population and is a appropriate tool for clinical and research opportunities.