TABLE 2.

N2 and P2 amplitudes before and after interventions [X ± SD (μV)].

		Group 1 (n = 15)	Group 2 (n = 15)	Group 3 (n = 15)	F	p †
N2	Pretest	17.56 ± 7.96	21.07 ± 7.04	21.07 ± 7.04	0.619	0.545
	Posttest	16.42 ± 8.39	19.32 ± 7.15	20.32 ± 9.30	0.614	0.548
	p ‡	0.296	0.105	0.887
P2	Pretest	21.27 ± 9.95	20.55 ± 8.74	19.21 ± 8.20	0.136	0.874
	Posttest	18.56 ± 9.49	19.61 ± 8.00	19.14 ± 8.11	0.440	0.957
	p ‡	0.043*	0.229	0.914

^*p < 0.05; ^†one-way ANOVA; ^‡paired t-test.