. Author manuscript; available in PMC: 2018 May 1.

Published in final edited form as: Int J Psychophysiol. 2017 Mar 12;115:112–124. doi: 10.1016/j.ijpsycho.2017.03.002

Table 3.

Twin correlations and heritability estimates (with 95% confidence intervals) for longitudinal measures of No-Go and Go ERP components.

ERP phenotype	Age	r_MZ	r_DZ	Additive Genetic (Heritability)	Non-shared Environmental
N2, FCZ	12	0.60^* (0.49 – 0.69)	0.33^* (0.19 – 0.45)	0.62^* (0.53 – 0.69)	0.38^* (0.31 – 0.47)
	14	0.56^* (0.43 – 0.66)	0.26^* (0.10 – 0.40)	0.56^* (0.45 – 0.65)	0.44^* (0.35 – 0.55)
	16	0.52^* (0.30 – 0.69)	0.08 (−0.14 – 0.29)	0.49^* (0.33 – 0.63)	0.51^* (0.37 – 0.67)
P3N, FCZ	12	0.60^* (0.48 – 0.69)	0.28^* (0.13 – 0.41)	0.60^* (0.50 – 0.68)	0.40^* (0.32 – 0.50)
	14	0.55^* (0.42 – 0.65)	0.32^* (0.17 – 0.46)	0.58^* (0.47 – 0.67)	0.42^* (0.34 – 0.53)
	16	0.64^* (0.46 – 0.77)	0.06 (−0.16 – 0.27)	0.61^* (0.45 – 0.73)	0.39^* (0.27 – 0.55)
P3G, PZ	12	0.60^* (0.49 – 0.69)	0.28^* (0.13 – 0.41)	0.62^* (0.53 – 0.69)	0.38^* (0.31 – 0.47)
	14	0.66^* (0.55 – 0.74)	0.21^* (0.06 – 0.37)	0.63^* (0.53 – 0.71)	0.37^* (0.29 – 0.47)
	16	0.66^* (0.47 – 0.78)	0.22 (−0.00 – 0.42)	0.63^* (0.48 – 0.74)	0.37^* (0.26 – 0.52)

N2, FCZ: amplitude of the No-Go N2 component at the fronto-central midline electrode (FCz); P3N, FCZ: amplitude of the No-Go P3 component at FCz; P3G, PZ: amplitude of the Go P3 component at the parietal midline electrode (Pz). r_MZ and r_DZ are intrapair correlations for MZ and DZ twin pairs, respectively (95% confidence intervals are shown in brackets);

p<.05;

a² is the proportion of total phenotypic variance explained by genetic factors (heritability) and e² is the proportion of variance due to non-shared environmental factors. Variance component estimates are based on the best-fitting model (see text and Supplementary Table 1).