Health Education and Health Promotion

en Psychometric Evaluation of the Life Quotient Questionnaire توصیفی و پیمایشی Descriptive & Survey Aims: This study aimed to evaluate the psychometric properties of the Life Quotient Questionnaire. Instrument & Methods: This cross-sectional psychometric study included 296 Persian-speaking adults recruited through convenience sampling via an online survey between February and May 2026. The 16-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 27 and AMOS 24. 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 56.6% of the total variance. The Kaiser–Meyer–Olkin index was 0.701, and Bartlett’s test of sphericity was significant (χ²=2290.27; p<0.001), supporting factorability. Factor loadings ranged from 0.60 to 0.99. Confirmatory factor analysis showed an acceptable-to-moderate fit for the four-factor model (comparative fit index=0.942; Tucker–Lewis index=0.859; root mean square error of approximation=0.092; standardized root mean square residual=0.027). Internal consistency was satisfactory across the factors (Cronbach’s α=0.82–0.89; composite reliability=0.82–0.89). 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.   Life, Surveys and Questionnaires, Health Psychology 357 365 http://hehp.daneshafarand.org/browse.php?a_code=A-10-1-133&slc_lang=en&sid=4 S. Mousavi 1003194753284600388065 1003194753284600388065 No Department of Psychology, Ahv.C. (Ahvaz Campus), Islamic Azad University, Ahvaz, Iran R. Johari Fard 1003194753284600388064 1003194753284600388064 Yes Department of Psychology, Ahv.C. (Ahvaz Campus), Islamic Azad University, Ahvaz, Iran S. Bakhtiarpour 1003194753284600388066 1003194753284600388066 No Department of Psychology, Ahv.C. (Ahvaz Campus), Islamic Azad University, Ahvaz, Iran