An apparatus to measure stimulus-related and response-related visual evoked potential in a simulated driving scenario

The present study evaluated an apparatus to measure the P3 event-related potential (ERP) component generated from both stimulus-locked (eye gaze) averaging and response-locked (key press) averaging. The apparatus used photographs of road sign related driving scenes as visual stimuli, and a customised EEG, eye tracking, and keyboard synchronised system. The results embraced a wider range of reaction time variation compared to similar work in the literature. In addition, the images used in this study include more complexity which explains the difference. The current experiment setup can reconstruct the P3 component using the response-locked averaging. This is then compared with the stimulus-locked averaging and a strong correlation is shown between the two approaches. This shows that response-locked averaging can be utilised as a sufficient tool to identify driver's visual stimuli registration in the brain. This observation may reduce the requirement for eye tracking in some future studies.