Table 5.

Confirmatory factor analysis for instruments.

Fit indices	User Satisfaction Evaluation Questionnaire	System Usability Scale
χ 2	7.313	30.074
df	4	9
χ2/df	1.83	3.34
P value	.120	<.001
Comparative Fit Index	0.973	0.816
Tucker–Lewis Index	0.931	0.694
Goodness-of-Fit Index	0.977	0.928
Root mean squared error of approximation	0.087	0.146
Standardized root mean squared residual	0.038	0.074