Students’ life satisfaction scale (SLSS) : psychometric properties with a sample of Polish adolescents

The Students’ Life Satisfaction Scale (SLSS) is one of the most frequently used measures of children’s and adolescents’ overall satisfaction with their lives. We examined several psychometric properties of the SLSS with a sample of Polish adolescents aged 14-15. Data from 612 Polish secondary school students (56.9% girls and 43.1% boys) were analyzed. The SLSS demonstrated acceptable properties, including internal consistency reliability, which was supported by Cronbach alpha and omega coefficients. Confirmatory factor analysis results for individual groups showed that after modifications, the 1-factor model for the SLSS displayed satisfactory fit. For each group (by age and sex), typically two (and in some cases three) modifications to the residual covariance had to be made. Tests of measurement invariance supported full scalar invariance for the groups of 14 and 15-year-olds and partial invariance for the groups of girls and boys