Collaborative brain-computer interfaces for target localisation in rapid serial visual presentation

The N2pc event-related potential appears on the opposite side of the scalp with respect to the visual hemisphere where an object of interest is located. In this paper, we propose a 2-user collaborative brain-computer interface that exploits this component for the automatic localisation of specific lateral targets in real aerial images displayed by means of the rapid serial visual presentation technique at speeds of 5-15 Hz. By combining the evidence from pairs of users using two different methods and with participant selection, we obtain absolute median improvements in the area under the receiver operating characteristic curve of up to 7.7% with respect to single-user BCIs.