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Table 2 Test of invariance BAS-2 questionnaire

From: Body Appreciation Scale (BAS-2): measurement invariance across genders and item response theory examination

  Df ΔDf χ2 Δχ2 p CFI ΔCFI RMSEA ΔRMSEA AIC BIC
Configural – Model 1 (free loadings, free intercepts) 70   161.20    .974   .072   8249.7 8487.0
Metric – Model 2 (equal loadings, free intercepts) 79 9 177.56 19.38 .022* .971 .004 .073 .001 8248.0 8449.8
Scalar – Model 3 (equal loadings, equal intercepts) 88 9 193.85 16.1 .063 .968 .003 .072 .001 8246.3 8412.5
Partial Invariance 82 12 172.17 810.61 .056 .975 .001 .071 .001 8236.6 8426.5
  1. All differences (Δ) were calculated obtaining the difference between the current model and the immediate model above except for partial invariance, where the difference was calculated against the configural model