Validity and reliability of the multidimensional student’s life satisfaction scale among Iranian girl students

Life satisfaction is a subjective and unique concept for each person and constitutes an essential component of the subjective well-being. The aims of this study was investigating the psychometric properties of Multidimentional Student’s Life Satisfaction Scale (MSLSS). 307 students from Tehran high schools were selected as participant size by stratified multiphase cluster sampling. To calculate the convergent validity of MSLSS, Satisfaction with Life Scale and Body Image Concern Inventory were performed. Confirmatory factor structure for the first-order approach of MSLSS estimated using Weighted Least Squares (WLS) criteria for assessing the adequacy of the data model with RMR, RMSEA, CFI, AGFI, GFI, 2c, / df2  and 2   used. Cronbach s alpha coefficient of MSLSS was above 0.70 and the limit was in satisfactory level. The first order factor structure of the MSLSS using confirmatory factor analysis was confirmed. Correlation coefficient analysis showed that MSLSS has a significant positive relationship with Satisfaction with Life Scale and significant negative relationship with Body Image Concern Inventory which shows the convergent validity. A single first-order factor structure of MSLSS was better fit with the observed data. Confirmatory factor structure, reliability and validity of the MSLSS for research applications and clinical diagnostics were in acceptable limits.