Table 2.

Test of invariance BAS-2 questionnaire

	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

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