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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