Аннотация:Detection of the smooth pursuit eye movement can be used to select an object moving on a computer screen {Vidal et al., 2013). However, moving objects may also become pursued without intention to select and become incorrectly selected. We hypothesized that intentional and spontaneous pursuits can be accompanied by different EEG patterns. We coregistered EEG and eye movement under two conditions: for intentional pursuit, participants were asked to select moving objects with gaze (pursuit caused target highlighting); spontaneous pursuit was provoked by an instruction to count dots on the moving objects. Both intentional and spontaneous pursuits were featured with an EEG lambda wave well-known for static gaze fixations. The intentional, but not spontaneous selection was accompanied, in all of the 20 participants, by an EEG wave, presumably related to the expectation of the feedback. This wave was similar, by time course and topography, to the EEG marker described for static object selection {Shishkin et al., 2016). The selection-related EEG marker did not differ between moving objects selection with smooth pursuit and static objects selection with dwells. Using a deep neural net {EEGNet, Lawhern et al., 2018), we successfully classified intentional vs. spontaneous pursuits. These results support the proposal of enhancing gaze interaction with an expectation-based passive braincomputer interface {Protzak et al., 2013), showing high robustness of the EEG marker related to the expectation of the interface feedback.
