Table 1.

Paired t-tests comparing all ISI conditions

t-Test Comparison: ISI1, ISI2
ISI1:	150 ms				250 ms			350 ms		550 ms
ISI2:	250 ms	350 ms	550 ms	1,050 ms	350 ms	550 ms	1,050 ms	550 ms	1,050 ms	1,050 ms
Frontal/central region
45–80 ms	0.029*	0.001*	<0.001*	<0.001*	1.000	0.483	<0.001*	1.000	<0.001*	<0.001*
85–105 ms	0.027*	0.008*	0.051	<0.001*	1.000	1.000	0.004 *	1.000	0.176	0.078
135–150 ms					0.002*	<0.001*	<0.001*	0.374	0.002*	1.000
Contralateral centroparietal/parietal region
45–80 ms	0.012*	0.002*	0.005*	<0.001*	1.000	1.000	<0.001*	1.000	<0.001*	<0.001*
85–105 ms	0.587	1.000	1.000	<0.001*	1.000	1.000	0.008*	1.000	<0.001*	0.002*
135–150 ms					0.001*	0.039*	<0.001*	1.000	0.228	0.498

Data are P values determined by paired t-tests comparing all interstimulus interval (ISI) conditions. Significant P values are marked by an asterisk. Specific regions of interest vary by time window, as detailed in text.