Psychometric Evaluation of the Life Quotient Questionnaire

Aims: This study aimed to evaluate the psychometric properties of the Life Quotient Questionnaire.Instrument & Methods: This cross-sectional psychometric study included ۲۹۶ Persian-speaking adults recruited through convenience sampling via an online survey between February and May ۲۰۲۶. The ۱۶-item Life Quotient Questionnaire measures four dimensions of quality of living, including mindful living, mature living, responsible living, and creative living. Data were analyzed using SPSS ۲۷ and AMOS ۲۴. Exploratory factor analysis and confirmatory factor analysis were performed to examine the factor structure. Reliability was assessed using Cronbach’s alpha and composite reliability. Convergent and discriminant validity were evaluated using the average variance extracted, the Fornell–Larcker criterion, and the heterotrait–monotrait ratio. Criterion validity was examined through correlations with a quality-of-life measure.Findings: Exploratory factor analysis supported a four-factor structure that accounted for ۵۶.۶% of the total variance. The Kaiser–Meyer–Olkin index was ۰.۷۰۱, and Bartlett’s test of sphericity was significant (χ²=۲۲۹۰.۲۷; p<۰.۰۰۱), supporting factorability. Factor loadings ranged from ۰.۶۰ to ۰.۹۹. Confirmatory factor analysis showed an acceptable-to-moderate fit for the four-factor model (comparative fit index=۰.۹۴۲; Tucker–Lewis index=۰.۸۵۹; root mean square error of approximation=۰.۰۹۲; standardized root mean square residual=۰.۰۲۷). Internal consistency was satisfactory across the factors (Cronbach’s α=۰.۸۲–۰.۸۹; composite reliability=۰.۸۲–۰.۸۹). Conclusion: The Life Quotient Questionnaire is a reliable and valid instrument with a stable four-factor structure for assessing the psychological dimensions of quality of living and their relationship to well-being.

کلیدواژه ها:

Life ، Surveys and Questionnaires ، Health Psychology