A multi-target BCI based on c-VEP

The EEG data set was recorded during a c-VEP BCI experiment. The experimental system consists of a personal computer (Lenovo China) and an EEG amplifier (a Synamps2 system, Neuroscan Inc.) with 64 EEG channels. The computer has a 24-in. liquid crystal display (LCD) monitor and a parallel port linked to the amplifier. The LCD monitor has a refresh rate of 60 Hz and a resolution of1920 1080 pixels. Stimulus presentation was operated in the computer and controlled by the stimulus program developed under Visual C++ 9.0 platform. DirectX (Microsoft Inc.) was employed to ensure the stability of frame-based rendering of stimuli. Event trigger signals yielded by the stimulus programwere sent from the parallel port of the computer to the EEG amplifier and recorded on an event channel for synchronizingstimulus presentation and EEG data recordings.