A Link between the Increase in Electroencephalographic Coherence and Performance Improvement in Operating a Brain-Computer Interface

Figure 4

Accuracy and ErCoh (average among trials, error bars indicate the confidence interval) for the cases in which subjects showed an increment on ErCoh in the contralateral centrofrontal or centroparietal areas.

(a) Subject 1 (PA, Cz-P3)

(b) Subject 2 (FES, C3-P3)

(c) Subject 4 (NA, C3-F3)

(d) Subject 5 (FES, C3-F3)

(e) Subject 6 (FES, C3-F3)