Table 5.

Correlations between neurocognitive skills and ERP measures.

Neurocognitive skill	ERP measure	ra	Sig.b
Verbal reasoning	P1 Left Speech-Nonspeech Differencec	0.248	0.050
Phonological processing	P1 Left-Speech Right-Nonspeech Biasd	0.304	0.016
Prereading skills	P1 Left-Speech Right-Nonspeech Bias	0.295	0.019
Naming speed	N2 Nonspeech Left-Right Differencee	0.375	0.002
Naming speed	N4 Speech Leftf	−0.229	0.071
Naming speed	N4 Speech Right	−0.290	0.021

Note that the amplitudes of N2 and N4 were reversed to keep correlation directions consistent.

^aPearson’s correlation coefficient; note that negative ERPs were reversed for analysis.

^bTwo-tailed significance.

^cAmplitude difference of left speech and nonspeech P1s.

^dDifference of left and right amplitude differences of speech and nonspeech P1s (maximal when speech P1 is largest at left and smallest at right, and nonspeech P1 vice versa).

^eDifference of left and right nonspeech N2s.

^fThe amplitude of left speech N4.