Figure 1. In each session every participant performed an auditory oddball and a visual P300 BCI internet browsing task.

The participants performed three sessions in total. We averaged the results of the web browsing task across the three sessions to determine the performance of each participant. The BCI system provided online feedback. We evaluated performance using the number of errors made by the participant. Features extracted from the auditory oddball session served as a performance measure and we assessed whether we can use them to predict BCI aptitude of participants with severe motor impairment in the visual P300 BCI task.