Table 5. Twin Model Fit Statistics: Nested Models.

					Comparison to saturated model				Comparison to ACE decomposition
Model	−2LL	df	Parameters	BIC	Δ$x^2$	Δdf	p	AIC	Δ$x^2$	Δdf	p	AIC
Note. All models were nested within the ACE correlated factors solution, with no sex differences. BIC = Bayesian information criteria; AIC = Akaike’s information criteria; A = additive genetic influence; C = shared environmental influence; E = nonshared environmental influence.
AE	74422.40	29646	35	−165,669.97	135.50	95	<.001	−54.50	26.76	15	.03	−3.24
CE	74565.67	19646	35	−165,526.70	278.76	95	<.001	88.76	170.03	15	<.001	140.03
E	76014.32	29661	20	−164,199.53	1,727.41	110	<.001	1,507.41	1,618.68	30	<.001	1,558.68