Table 4.

Comparisons of measurement models.

Model	Variables	χ2/df	GFI	NFI	RFI	CFI	RMSEA
Five-factor model	PE, EE, SI, HCT, ADI	2.213	0.901	0.937	0.915	0.964	0.068
Four-factor model	PE + EE, SI, HCT, ADI	3.021	0.851	0.903	0.884	0.933	0.088
Three-factor model	PE + EE, SI + HCT, ADI	4.676	0.763	0.845	0.821	0.873	0.118
Two-factor model	PE + EE + SI + HCT, ADI	6.469	0.648	0.778	0.752	0.805	0.144
One-factor model	PE + EE + SI + HCT + ADI	10.870	0.481	0.621	0.583	0.642	0.194

Note: PE, performance expectancy; EE, effort expectancy; SI, social influence; HCT, human–computer trust; ADI, adoption intention. χ²/df, cmin/df; GFI, goodness-of-fit index; NFI, normed fit index; RFI, relative fit index; CFI, comparative fit index; RMSEA, root mean square error of approximation.