Research Article

Online Detection of P300 and Error Potentials in a BCI Speller

Table 1

Results of the GA online in free mode. Training set size is the number of letters spelled in copy mode to collect training examples for the GA classifier. Performance is given as the number of correctly predicted letters over the total numbers of letters in the online usage.

Subject Training No. online
set size repetitions performance

B1 196 4 74/109 (68%)
B3 108 5 137/202 (68%)