Table 3.

Three-class classification results obtained using a single spectral power feature when separating EEG epochs of 10 s recorded during “easy”, “medium” and “hard” discriminations

The five features giving the best average accuracies are listed. Accuracies obtained using absolute EEG power for each frequency band and each channel are presented as topographic maps (frontal electrodes are located at the top). Details about frequency bands can be found in “Feature extraction and selection” section