Table 1.

Bivariate correlations between IQ, executive function variables and P300 amplitudes for faster (quartile 2) and slower (quartile 4) responding at electrode sites where P300 was maximal.

	CP3 fast	CP3 slow	CP4 fast	CP4 slow	CPz fast	CPz slow
IQ	−0.499*	−0.514*	−0.382	−0.356	−0.440	−0.482
FAS	0.277	0.352	0.369	0.369	0.315	0.323
Food	0.086	0.237	0.038	0.238	0.089	0.139
Switching	0.015	−0.141	0.266	0.409	0.050	−0.048
Stroop	−0.360	−0.562*	−0.145	−0.605*	−0.481	−0.595*
SART	−0.377	0.103	−0.223	0.052	−0.304	0.100
Composite measure	0.340	0.275	0.316	0.482	0.375	0.269

SART = Sustained Attention to Response Task; * p < 0.05.