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

Table 3 Fit statistics for scales from the confirmatory factor analyses

Scale	Number of items	χ²	df	P	CFI	TLI	SRMR	RMSEA	RMSEA 90% CI	α	ω	glb
Full scale with unidimensional solution	15	1990.97	90	0.0000	0.664	0.608	0.09	0.11	[0.10 0.12]
Full scale initial	15	417.67	87	0.0000	0.889	0.866	0.06	0.06	[0.06 0.07]
Full scale revised	15	332.59	85	0.0000	0.917	0.897	0.05	0.05	[0.05 0.06]	0.79	0.77	0.86
F1	5	7.09	5	0.2141	0.997	0.993	0.01	0.02	[0.00 0.05]	0.66	0.68	0.70
F2	5	23.32	5	0.0003	0.984	0.969	0.02	0.06	[0.04 0.09]	0.79	0.79	0.80
F3	5	15.91	4	0.0031	0.974	0.935	0.02	0.06	[0.03 0.09]	0.61	0.62	0.66

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 α Cronbach’s alpha; ω McDonald’s omega; glb greatest lower bound. Full scale initial means a prior three-factor model was fitted to the data; Full scale revised means initial model was revised by specifying the residual correlations between e9 and e4, and between e14 and e13

ISSN: 1472-6920