Adaption and validation of the Perceived Control of Internal States Scale (PCOISS) in Chinese adults: a cross-sectional study

Table 3 Fit indices and model comparisons (n_B = 1354)

Model	χ²	df	GFI	TLI	CFI	RMSEA	SRMR	AIC	BIC	CAIC	△χ²	△df
Three-factor model (Model 1)	406.01	74	0.96	0.94	0.95	0.06	0.04	468.01	629.54	660.54
One-factor model (Model 2)	1245.73	77	0.86	0.81	0.84	0.11	0.07	1301.73	1447.64	1475.64	839.73***	3
Random intercept factor model (Model 3)	620.01	76	0.93	0.91	0.92	0.07	0.04	678.01	829.12	858.12	214.01***	2

Significance is indicated by (^***) for p < 0.001. Model 1: Factor 1, 2 and 3 constituted the first-order oblique model. Model 2: Factor1, 2 and 3 were combined into one factor. Model 3: Each item was affected by a trait variable, a method effect variable and an error. Compared with Maydeu-Olivares and Coffman’s original model [43], the difference in this study was that reverse scoring items were used, for which the loadings were fixed to − 1 in the method effect variance

ISSN: 2050-7283