Summary of the classification results obtained for the control, goal conduciveness and power appraisal checks from the EMG signals (Study 2).

Results are shown for different numbers of averaged trials per participant, and different numbers of channels (only for EEG). The classifiers’ performance was quantified using the Unweighted Average Recall (UAR), and the difference between the UAR and the analytical chance level (diffUAR) estimated using the method described in [35]. Star symbols indicate the significant one-tailed Student’s t -tests conducted to examine when classification performances were significantly above empirical chance level (*p p p