Table 5.

Heritability estimates for the AIs, their corresponding standard errors and P-values, based on a large family dataset (GOBS). In the middle part of the table are the genetic correlations between left and right volumes (heritabilities of their phenotypic correlations), and test P-values for whether the genetic correlations differ significantly from 0 and 1. In the right-hand part of the table are the environmental and phenotypic correlation estimates between left and right volumes

Structure	AI heritability		Genetic correlation (ρ) between Left and Right			Phenotypic (ρ-phen) and environmental (ρ-env) correlation between Left and Right
	h2 (se)	P-value	ρ (se)	P (ρ = 0)	P (ρ = 1)	ρ-phen	ρ-env
Nucleus accumbens	0.114 (0.06)	0.010	0.841 (0.07)	4*10−10	0.003	0.54	0.34
Amygdala	0.040 (0.05)	0.222	0.995 (0.03)	8*10−24	0.424	0.71	0.39
Caudate nucleus	0.096 (0.06)	0.053	0.974 (0.01)	2*10−32	0.021	0.85	0.56
Globus pallidus	0.148 (0.06)	0.002	0.823 (0.08)	8*10−8	0.005	0.57	0.45
Hippocampus	0.180 (0.06)	4*10−4	0.939 (0.02)	2*10−25	7*10−4	0.78	0.53
Putamen	0.270 (0.07)	8*10−7	0.899 (0.03)	5*10−23	4*10−7	0.78	0.58
Thalamus	0.228 (0.06)	2*10−5	0.824 (0.05)	1*10−13	4*10−6	0.68	0.56