Measurement invariance of the strength of motivation for medical school: a multi-group confirmatory factor analysis

Table 5 Measurement invariance for subscales across gender

Scale	χ²	df	p	△χ² (p)	CFI	△CFI	TLI	SRMR	RMSEA	RMSEA 90% CI
F1
Step 1: Configural invariance	12.41	10	0.2584		1.00		0.99	0.02	0.02	[0.00, 0.06]
Step 2: Metric invariance	15.80	14	0.3256	−3.39 (−0.0672)	1.00	0.00	1.00	0.03	0.02	[0.00, 0.05]
Step 3: Scalar invariance	20.45	18	3081	−4.65 (−0.175)	1.00	0.00	1.00	0.03	0.02	[0.00, 0.05]
F2
Step 1: Configural invariance	25.21	10	0.0050		0.99		0.97	0.02	0.06	[0.03, 0.08]
Step 2: Metric invariance	31.06	14	0.0054	−5.85 (−0.0004)	0.99	0.00	0.98	0.04	0.05	[0.03, 0.08]
Step 3: Scalar invariance	44.42	18	0.0005	−13.36 (0.0050)	0.98	0.01	0.98	0.04	0.06	[0.04, 0.08]
F3
Step 1: Configural invariance	21.07	8	0.0070		0.97		0.93	0.03	0.06	[0.03, 0.09]
Step 2: Metric invariance	27.32	12	0.0069	−6.25 (0.0001)	0.97	0.00	0.94	0.04	0.05	[0.03, 0.08]
Step 3: Scalar invariance	39.17	16	0.0010	−11.85 (0.0059)	0.95	0.02	0.94	0.04	0.06	[0.03, 0.08]
Step 4: intercepts freed to vary	31.08	14	0.0054	−3.76 (0.0015)	0.96	0.01	0.95	0.04	0.06	[0.03, 0.08]

F1 willingness to sacrifice subscale, F2 readiness to start subscale F3 persistence subscale CFI comparative fit index, TLI Tucker-Lewis Index, CI confidence interval, SRMR standardized root-mean-square residual, RMSEA root-mean-square error of approximation

ISSN: 1472-6920