TABLE 7.

Fit indices for CFA models of item scores from the BFI-2 domains.

Model	χ2	df	CFI	RMSEA [90% C.I.]	p(Δχ2)
Extraversion
Single domain	337.13	54	0.783	0.113 [0.102–0.125]
Three facets	155.15	51	0.920	0.071 [0.058–0.084]
Three facets plus acquiescence	152.25	50	0.921	0.071 [0.058–0.084]	0.159
Agreeableness
Single domain	294.31	54	0.756	0.104 [0.093–0.116]
Three facets	191.89	51	0.857	0.082 [0.070–0.095]
Three facets plus acquiescence	132.14	50	0.917	0.063 [0.050–0.077]	<0.000
Conscientiousness
Single domain	383.84	54	0.751	0.122 [0.111–0.134]
Three facets	173.72	51	0.907	0.077 [0.064–0.089]
Three facets plus acquiescence	135.73	50	0.935	0.065 [0.052–0.078]	<0.000
Negative Emotionality
Single domain	370.57	54	0.846	0.120 [0.108–0.131]
Three facets	135.13	51	0.959	0.064 [0.051–0.077]
Three facets plus acquiescence	112.37	50	0.970	0.055 [0.042–0.069]	<0.000
Open-Mindedness
Single domain	325.47	54	0.759	0.111 [0.099–0.123]
Three facets	110.67	51	0.947	0.053 [0.040–0.067]
Three facets plus acquiescence	109.46	50	0.947	0.054 [0.040–0.068]	0.307

N = 409. df, degree of freedom; CFI, comparative fit index; RMSEA, root mean square error of approximation. p(Δχ²) = p-value for difference in χ² between the models with and without acquiescence factor, estimated with the formula for MLR Chi-square difference testing (Muthén and Muthén, 2022).