. Author manuscript; available in PMC: 2014 Mar 1.

Published in final edited form as: Behav Genet. 2013 Jan 31;43(2):97–107. doi: 10.1007/s10519-013-9584-z

Table 2.

Fit of the Biometric Models.

Model	-2LL	Free	χ²(df), p-value	AIC
		Parameters
ACE	114287.4	50	N/A	85617.37
ADE	114365.3	50	N/A	85695.34
AE	114314.9	35	27.5(15), .02	85614.88

For the ACE, ADE, and AE models, the A refers to the additive genetic component, D to the dominant/recessive genetic component, C to the shared environmental component, and E to the non-shared environmental component. -2LL is minus to the log of the likelihood. AIC is the Akaike Information Criterion. The χ² is for comparison between the AE and the ACE model. The significant p-value of .02 indicates that the AE leads to decrement in fit.