Table 4.

AEP developmental changes.

	TD (n = 21)	RTT (n = 12)	TD vs RTT difference
P1 60–90 ms	−0.631/0.002*	−0.447/0.145	z = −0.64, p = 0.52
N1 100–130 ms	−0.636/0.002*	−0.183/0.569	z = −1.39, p = 0.16
P2 135–165 ms	−0.398/0.074	0.184/0.566	z = −1.49, p = 0.14
N2 245–275	0.700/<0.0001*	0.227/0.479	z = 1.56, p = 0.12

Numbers in the second and third columns are the Pearson correlation coefficients (r) and their significance values (p) for correlations between age and the amplitudes of the four AEP components of interest. Fisher’s z transformation and its significance value (p) were used to compare the correlation coefficients between the groups and are represented in the fourth column. An asterisk is used to denote correlations that reached significance. Note that while developmental changes were significant only in the TD group, there were no detectable differences in the correlation coefficients between RTT and TD groups.