Fig. 2.

Evaluation of movement detection. A) ROC plots showing sensitivity against the false positive rate for the different possible thresholds used for decoding. Blue and red thin lines show the ROC curves of individual cases for cued brief movements and self-paced continuous movements, respectively. The thick blue line shows the ROC averaged across all cases. B) Area Under the Curve (AUC). C) Histogram of detection delays of individual movements. Zero is movement onset. D) Sensitivity and false positive rate for detecting brief and continuous movements, respectively, with a constant decision threshold of 0.4. (For interpretation of the references to colour in this figure legend, the reader is referred to the Web version of this article.)