Table 2.

Model effects for absolute power

Absolute power (μV2)	χ2	df	p	Post hoc
Delta
Group	0.41	2	.814
Group × Region	6.80	4	.147
Group × Hemisphere	9.01	4	.061
Group × Region × Hemisphere	19.04*	8	.015	N.S.
Theta
Group	5.27	2	.072
Group × Region	24.67***	4	<.001	Central: HI < LI
Group × Hemisphere	13.48**	4	.009	N.S.
Group × Region × Hemisphere	40.74***	8	<.001	Midline central: HI < LI, MI
Alpha
Group	10.64**	2	.005	HI < LI
Group × Region	41.68***	4	<.001	Frontal: HI < LI
				Central: HI < LI, MI
Group × Hemisphere	24.97***	4	<.001	Midline: HI < LI, MI
Group × Region × Hemisphere	55.49***	8	<.001	Left central: HI < MI
				Midline frontal: HI < LI
				Midline central: HI < LI, MI
				Right frontal: HI < LI
Beta
Group	2.28	2	.320
Group × Region	19.74**	4	.001	N.S.
Group × Hemisphere	16.28**	4	.003	N.S.
Group × Region × Hemisphere	18.95*	8	.015	Midline central: HI < LI, MI
Gamma
Group	0.72	2	.698
Group × Region	2.15	4	.709
Group × Hemisphere	7.10	4	.131
Group × Region × Hemisphere	23.68**	8	.003	N.S.

Note. The Bonferroni-corrected post hoc comparison was used (p < .0167). LI: low-impulsivity group; MI: middle-impulsivity group; HI: high-impulsivity group; N.S.: not significant.

*p < .05. **p < .01. ***p < .001.