. Author manuscript; available in PMC: 2012 Nov 1.

Published in final edited form as: J Child Psychol Psychiatry. 2011 May 31;52(11):1155–1163. doi: 10.1111/j.1469-7610.2011.02420.x

Table 4.

Fit Statistics for Trivariate Models of Inhibitory Control and Behavior Problems.

	Overall Fit of the Model			Relative Fit of the Model
	−2LL	df	AIC	χ^2diff	df^diff	p
Observed IC, Parent-rated IC and Externalizing Behavior Problems
1. Full Model	6765.53	1763	3239.53	-	-	-
2. No A Covariance	6795.02	1766	3263.02	29.49	3	.00
3. No C Covariance	6766.90	1766	3234.90	1.37	3	.71
4. No E Covariance	6792.69	1766	3260.69	27.16	3	.00
5. No C on Observed IC and No C Covariance	6766.90	1767	3232.90	1.37	4	.85
Observed IC, Parent-rated IC and ADHD Behavior Problems
1. Full Model	7924.77	1798	4328.77	-	-	-
2. No A Covariance	7965.26	1801	4363.26	40.49	3	.00
3. No C Covariance	7925.77	1801	4323.77	1.0	3	.80
4. No E Covariance	7943.11	1801	4341.11	18.34	3	.00
5. No C on Observed IC, ADHD and No C Covariance	7925.77	1803	4319.77	1.0	5	.96

Note. −2LL= Likelihood Statistic; df= degrees of freedom; AIC= Akaike’s Information Criterion; χ^2diff= Chi-square difference between full ACE/ACE model and reduced model; df^diff= df difference between full ACE/ACE model and reduced model; A=additive genetic effects; C=shared environmental effects; E=nonshared environmental effects. Boldface denotes best fitting model.