Table 1.

Total number of electrodes showing significant target versus nontarget conditional effects in HFB activity and P3b response computed across subjects for each experiment separately is reported as a function of brain region (frontal vs. parietal)

	Auditory (n = 6)	Visual (n = 8)
Frontal
HFB
Target only	33	15
Conditional effect	24	7
P3b
Target only	—	7
Conditional effect	11	1
Total electrodes	123	195
Parietal
HFB
Target only	13	40
Conditional effect	8	18
P3b
Target only	—	35
Conditional effect	4	10
Total electrodes	66	183

Note: For the auditory tasks, we directly tested for target versus nontarget conditional differences in the P3b (as described in the Materials and Methods section). Therefore, only electrodes showing the conditional effect are reported. The total number of electrodes showing significant increases within the target condition only (i.e. target response period compared with baseline period referred to as “Target Only”) is reported where applicable. The total number of electrodes analyzed across subjects as a function of brain area is also reported for each experiment.