Table 5. Standardized Estimates (with 95% CI) of Genetic, Common, and Nonshared Environmental Contributions to Variance of RTV and EEG Measures.

	h²	c²	e²
RTV	.59 (.20 to .77)^a	0 (0 to.48)	.41 (.23 to .49)^a
Source PhV	.45 (.09 to .68)^a	0 (0 to.59)	.55 (.32 to .95)^a
Source AmM	.52 (.12 to .76)^a	0 (0 to.38)	.48 (.24 to .88)^a
Channel PhV	.17 (.15 to .49)^a	.27 (.11 to .92)^a	.44 (.17 to .89)^a
Channel PhM	.43 (.41 to .65)^a	0 (0 to.72)	.57 (.52 to .99)^a

h², c² and e²: standardized genetic and environmental variance components. For ADHD, these are fixed to h² = .76 and e² = .24. All incongruent correct.

ADHD, attention-deficit/hyperactivity disorder; CI, confidence interval; EEG, electroencephalographic; AmM, mean amplitude; AmV, variability in amplitude; PhM, mean phase; PhV, phase variability; RTV, reaction time variability.

Significant estimates.