Table 1.

Amplitude and latency values of the maximal peak of a late positive component between in a window from 199 to 1,000 ms (samples 51 to 256 sampled at 256 Hz).

	Visual P300 BCI			Auditory P300 BCI			Tactile P300 BCI
	Mean	SD	Range	Mean	SD	Range	Mean	SD	Range
Fz (amplitude)	5.5 μV	1.6	3.7–7.7	8.1 μV	5	2.4–15.2	7.3 μV	2.1	3.8–10.7
Fz (latency)	341 ms	120	219–488	732 ms	141	477–887	778 ms	303	199–1,000
Cz (amplitude)	5.9 μV	1.9	2.8–9.3	6.4 μV	3.1	1.8–12.2	6.8 μV	2.7	2.2–12.8
Cz (latency)	348 ms	113	227–492	737 ms	140	484–871	792 ms	222	199–996