Table 2.

Detailed statistical results for the analysis of nonlinguistic probe amplitude. We analyzed the effect of attention and age on the amplitude of each measured peak separately for each age group with repeated-measures ANOVAs. Factors of attention (Attended, Unattended) and scalp distribution were included in a 2 (Hemisphere: Left, Right Hemisphere) × 2 (Laterality: Lateral, Medial site) × 6 (Anteriority: Frontal, Frontocentral, Central, Central-Parietal, Parietal, Parietal-Occipital) ANOVA.

	Age	Latency	Summary	Attention	Att × hemi	Att × ant	Att × lat	Att × hemi × ant	Att × hemi × lat	Att × ant × lat	Att × ant × hemi × lat
Component
Early positivity	3–5 yo	(165–185)	**	F(1,19) = 4.5 p = .046	F(1,19) = 5.2 p = .035		F(1,19) = 12 p = .003	F(2.8,53) = 2.7 p = .055	F(1,19) = 4.3 p = .051	F(3.7,71) = 4.0 p = .01	F(3.3,63) = 3.8 p = .012
P1	10 yo	(104–124)	n.s.							F(3.1,52) = 2.3 p = .09
	13 yo	(81–101)	*	F(1,17) = 8.1 p = .011			F(1,17) = 7.3 p = .015
	16 yo	(76–96)	n.s.
	Adults	(73–93)	***	F(1,19) = 21 p < .001	F(1,19) = 3.9 p = .062		F(1,19) = 27 p < .001			F(3.6,67) = 3.8 p = .01
Early-N1	13 yo	(131–151)	n.s.
	16 yo	(132–152)	n.s.
	Adults	(131–151)	n.s.
P2	10 yo	(184–204)	*		F(1,18) = 5.9 p = .025		F(1,18) = 3.6 p = .075		F(1,18) = 4.3 p = .053	F(3.5,63) = 2.3 p = .080
	13 yo	(190–210)	***	F(1,17) = 16 p = .001			F(1,17) = 16 p = .001
	16 yo	(193–213)	∼			F(1.5,25) = 2.9 p = .090				F(3.0,50) = 2.4
	Adults	(200–220)	**	F(1,19) = 8.8 p = .008			F(1,19) = 8.2 p = .01		F(1,19) = 3.3 p = .084