Table 1.

Means (Standard Deviations) and Sample Sizes for Frontal Asymmetry and Alpha Power at Rest 1 and Rest 2, by Sex and Zygosity (Untransformed Data)

	Males		Females		DZ opposite sex
	MZ	DZ	MZ	DZ	Males	Females
Mid asymmetry rest 1	−.02 (1.05) n=212	.32 (1.06) n=128	−.11 (.92) N=234	.11 (2.22) n=146	.01 (.83) n=113	.15 (.71) n=110
Lateral asymmetry rest 1	−.16 (1.05) n=212	.07 (1.26) n=128	−.10 (1.45) N=234	−.41 (3.18) n=146	−.09 (1.08) n=113	−.14 (1.20) n=110
Mid asymmetry rest 2	−.10 (.99) n=162	.14 (1.00) n=94	.12 (1.62) N=212	.41 (2.82) n=121	−.01 (.96) n=92	.07 (1.02) n=91
Lateral asymmetry rest 2	−.17 (1.28) n=162	.01 (1.21) n=94	−.15 (1.58) N=212	−.12 (1.04) n=121	−.08 (1.02) n=92	.03 (1.34) n=91
F3 rest 1	13.43 (5.69) n=212	14.70 (7.01) n=128	15.02 (8.58) N=234	14.70 (7.36) n=146	13.38 (6.30) n=113	15.52 (8.89) n=110
F4 rest 1	13.48 (5.59) n=212	14.06 (6.16) n=128	14.80 (8.32) N=234	14.48 (7.68) n=146	13.36 (6.38) n=113	15.22 (9.06) n=110
F7 rest 1	9.50 (4.16) n=212	10.13 (4.65) n=128	10.06 (6.05) N=234	9.04 (5.45) n=146	9.18 (4.34) n=113	10.33 (6.86) n=110
F8 rest 1	9.81 (4.23) n=212	9.98 (4.07) n=128	10.25 (5.16) N=234	10.85 (8.07) n=146	9.36 (4.69) n=113	10.60 (5.89) n=110
F3 rest 2	14.27 (6.51) n=162	14.52 (6.29) n=94	15.29 (8.38) n=212	14.85 (8.97) n=121	13.78 (7.03) n=92	16.06 (10.62) n=91
F4 rest 2	14.47 (6.64) n=162	14.24 (6.09) n=94	15.04 (7.78) n=212	14.02 (7.16) n=121	13.80 (6.88) n=92	15.91 (11.63) n=91
F7 rest 2	10.07 (4.62) n=162	10.17 (4.65) n=94	10.32 (5.94) n=212	9.83 (5.15) n=121	9.50 (4.60) n=92	11.16 (8.18) n=91
F8 rest 2	10.42 (4.77) n=162	10.14 (4.63) n=94	10.62 (5.51) n=212	10.07 (4.94) n=121	9.66 (5.04) n=92	11.10 (6.99) n=91

Note. MZ = Monozygotic, DZ = Dizygotic, Mid asymmetry = Mid-frontal asymmetry (F3–F4), Lateral asymmetry = Lateral-frontal asymmetry (F7–F8).