. Author manuscript; available in PMC: 2017 Sep 1.

Published in final edited form as: Psychopharmacology (Berl). 2016 Jul 23;233(18):3361–3370. doi: 10.1007/s00213-016-4372-0

Table 3.

Structural model fit indices.

Model	χ²(df)	CFI	RMSEA	TLI	SRMR
Model 1: Unidimensional control model	5737.98(90)^**	0.304	0.224	0.188	0.182
Model 2: Binary control model (tasks and self-report measures aggregated together)	5727.61(89)^**	0.305	0.225	0.180	0.180
Model 3A: Three-factor model (impulsive choice, impulsive action, IPTs; all indicators included)	1194.59(87)^**	0.863	0.101	0.853	0.072
Model 3B: Three-factor model (removing SS)	618.524(74)^**	0.931	0.077	0.915	0.044
Model 3C: Final three-factor model	242.99(72)^**	0.978	0.044	0.972	0.033
Model 4: Exploratory four-factor model (impulsive choice, impulsive action, BIS, and UPPS all separate)	612.029(71)^**	0.931	0.078	0.912	0.043

Notes: The chi-square difference tests between models were all statistically significant.

SS = Sensation Seeking; CFI = Confirmatory Fit Index; RMSEA = Root Mean Square Error of Approximation; TLI= Tucker Lewis Index; SRMR= standardized root mean square residual; BIS = Barratt Impulsiveness Scale; UPPS = UPPS-P UPPS-P Impulsive Behavior Scale;

^**

p <.01