2.5 Data Acquisition
Participants performed the AVSRT task in a dimly lit, sound-attenuated, electrically shielded booth, seated 122 cm from the display. High-density EEG was acquired from 64 scalp electrodes and 4 external electrodes (bilateral mastoid, bilateral electrooculogram [EOG]) using a BioSemi Active II system with an open pass-band from DC to 103Hz. Data were digitized online at 512 Hz and referenced online to the Common Mode Sense active electrode and the driven right leg (DRL) passive electrode.