Abstract
The present study aimed to translate and examine the psychometric properties and gender invariance of the Riverside Life Satisfaction Scale (Margolis et al., 2019) within Iranian samples. This applied research employed a descriptive-correlational survey design. In Study 1, 404 married teachers from Zanjan province were selected via cluster random sampling. In Study 2, 228 married individuals participated through convenience sampling. Data were collected using the Riverside Life Satisfaction Scale and analyzed using SPSS 27 and AMOS 26. Exploratory and confirmatory factor analyses supported a unidimensional structure with satisfactory model fit indices. Internal consistency, assessed via Cronbach’s alpha (α = 0.80) and composite reliability (CR = 0.79), indicated acceptable reliability. Test–retest reliability further confirmed measurement stability. Convergent validity was supported by the Average Variance Extracted (AVE), and discriminant validity was established using the Heterotrait-Monotrait ratio (HTMT). Multi-group confirmatory factor analysis confirmed gender invariance of the scale. Additionally, life satisfaction demonstrated significant positive correlations with marital relationship quality and eudaimonia scale, and significant negative correlations with fear of missing out (FoMO) and marital conflict, providing evidence for both convergent and divergent validity. Overall, the Riverside Life Satisfaction Scale showed sound psychometric properties and can be considered a valid and reliable instrument for clinical and research use within the Iranian context.