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Table 3 Measurement invariance tests

From: Measurement invariance properties and external construct validity of the short Warwick-Edinburgh mental wellbeing scale in a large national sample of secondary school students in Wales

Model constraints CFI RMSEA Degrees of freedom χ2 χ2 difference p-value
Configural 0.979 0.078 70 3808.5   
Loadings 0.983 0.060 94 4014.0 204.1 < 0.001
Loadings, thresholds 0.978 0.051 174 6049.5 2480.6 < 0.001
Loadings, thresholds, residuals 0.958 0.064 202 11,812.5 6169.4 < 0.001