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Table 1 Summary of psychometric tests carried out on two samples

From: The Warwick-Edinburgh Mental Well-being Scale (WEMWBS): development and UK validation

Psychometric property Statistical test Student sample (number) Population sample (number)
Content validity Responder bias: Chi-square tests - 2075
  Missing and popular responses 348 2075
  Floor/ceiling effects (individual items) 348 1749
Construct validity Confirmatory Factor Analysis 348 1749
Internal consistency Cronbach's α 's 348 1749
  Item-total score correlations 348 1749
Criterion validity Floor and ceiling effects (total score) 348 1749
  Demographic differences in scores: - 1749
  Wilcoxon rank sum tests/Kruskal-Wallis tests/Jonckheere's test   
  Correlations with other scales:   
  Spearman's rank correlation coefficient 72 (EQ-5D VAS) 1233 (GHQ-12)
   63 (PANAS- PA/NA)  
   63 (SPWB)  
   71 (SDHS)  
   79 (WHO-5)  
   79 (SWLS)  
   77 (GLS)  
   67 (EIS)  
  Jonckheere's test - 1233(GHQ-12)
Reliability Intra-class correlation coefficients 124 -
Social desirability bias Spearman's rank correlation coefficient 116 -