Results of feedback sessions for dry vs. full cap.

Feedback gel cap (top) reports feedback data from an earlier study (3). The first line shows the bit/min information transfer rate of 1D cursor control averaged over 8 sessions consisting of 25 trials each. The second line gives the average percentage of correct trials and the third and fourth lines provide the average time per trial and the peak performing session result. Feedback dry cap (middle) as above. Note that here 4 sessions of 100 trials each were evaluated. Also the peak performance was computed as the best 25 consecutive trials. The lower part (bottom) of the table summarizes the relative loss in performance of the respective setups for the subjects. Note that a negative sign indicates lower performance of the dry electrode cap. ��% of MVC�� stands for the power of feedback trials, as compared to the maximum voluntary contraction (MVC). EMG-fb stands for the EMG activity in the actual feedback trials, as compared to the preparatory phase of each feedback trial, EMG-pre.