The Long and Short-Form Warwick-Edinburgh Mental Well-Being Scale: A Reliability Generalization Meta-Analysis

This study used non-experimental research design with archival data. Guided by systematic inclusion/exclusion criteria, electronic database searches identified 294 published articles reporting estimates of score reliability for either the WEMWBS or SWEMWBS. Sample, design and instrument characteristics were extracted then coded examined to address factors that may impact score reliability for both instruments. Across all published studies, mean score reliability estimates for the WEMWBS and SWEMWBS were 0.89 and 0.81 respectively across published studies. Moderator analyses revealed select sample (e.g., Age) and instrument characteristics (e.g., standard deviation of scores) that influenced score reliability. Limited error of measurement was evident based on average score reliability estimates for the WEMWBS/SWEMWBS. Further, interpretation of the moderator analyses demonstrated scale scores are quite robust to test administration in different samples, instrument versions and study designs.
Source: Journal of Happiness Studies - Category: Psychiatry & Psychology Source Type: research