Fig. 2: Neurophysiological data - BCI paradigm: experimental design and classification results for each patient.

A Online and offline results indicate the absence of BCI control by patient 1. B Online and offline results indicate the absence of BCI control by patient 2. The high cross-validation accuracy is consistent with overfitting. For p > 0.05, chance levels are: at 62.5 % for 40 trials, at 70 % for 20 trials, at 83 % for 12 trials.