Warwick Edinburgh Mental Well-Being Scale (WEMWBS): measurement invariance across genders and item response theory examination

BMC Psychology

Jeremy Vassallo¹  Rhiannon Patten¹  Joshua Marmara¹  Daniel Zarate¹  Vasileios Stavropoulos² 

[1] Institute for Health and Sport, Victoria University, PO Box 14428, 8001, Melbourne, Australia;Institute for Health and Sport, Victoria University, PO Box 14428, 8001, Melbourne, Australia;Department of Psychology, University of Athens, Athens, Greece;

关键词: Subjective well-being;    Measurement invariance;    Item response theory;    Psychometric properties;    Positive psychology;    Gender;   

DOI  :  10.1186/s40359-022-00720-z

来源: Springer

【 摘 要 】

BackgroundThe Warwick Edinburgh Mental Well-Being Scale (WEMWBS) is a measure of subjective well-being and assesses eudemonic and hedonic aspects of well-being. However, differential scoring of the WEMWBS across gender and its precision of measurement has not been examined. The present study assesses the psychometric properties of the WEMWBS using measurement invariance (MI) between males and females and item response theory (IRT) analyses.MethodA community sample of 386 adults from the United States of America (USA), United Kingdom, Ireland, Australia, New Zealand, and Canada were assessed online (N = 394, 54.8% men, 43.1% women, Mage = 27.48, SD = 5.57).ResultsMI analyses observed invariance across males and females at the configural level and metric level but non-invariance at the scalar level. The graded response model (GRM) conducted to observe item properties indicated that all items demonstrated, although variable, sufficient discrimination capacity.ConclusionsGender comparisons based on WEMWBS scores should be cautiously interpreted for specific items that demonstrate different scalar scales and similar scores indicate different severity. The items showed increased reliability for latent levels of ∓ 2 SD from the mean level of SWB. The WEMWBS may also not perform well for clinically low and high levels of SWB. Including assessments for clinical cases may optimise the use of the WEMWBS.

【 授权许可】

CC BY