genetic correlations (>.70) were observed among the slower (delta theta) and among faster oscillations (alpha beta). Results from twin studies generally ranged from 0.50 to 0.90, although the twin‐based r G between theta and delta oscillation power is generally not as strong as the SNP r G observed here. This inconsistency between twin/family and SNP coheritability could perhaps be explained by the restricted scalp locations tested in the current analysis and/or the sample heterogeneity (e.g., COGA families ascertained through alcohol use disorders), but also the fact that only common variants were used.
