Biometric model-fitting analyses indicated that a substantial proportion of the variation in the different EEG measures examined in this study reflects heritable individual differences, with a median heritability estimate of .78. Measures of alpha and beta power as well as alpha peak frequency were particularly heritable, with estimates of additive genetic influence ranging from .79 to .85. These results, derived from fitting biometric models to both family and twin data, are consistent with the substantial heritability estimates obtained in previous research (Enoch et al., 2008; D. J. Smit et al., 2005; Tang et al., 2007; van Beijsterveldt et al., 1996), particularly for the higher frequencies.
