Steady-State Visual Evoked Potential based Brain Computer Interface: Experiment of LED stimulation in two-rooms condition

The aim of this study is to determine the effect of room´s light condition to brain response. Brain response to repetitive visual stimulation is called Steady-State Visual Evoked Potential (SSVEP) based Brain-Computer Interface (BCI). In this study, flickering Light Emitting Diode (LED) is used as visual stimulation. Mostly, brain response is recorded using electroencephalograph (EEG) and recorded in the brain´s occipital lobe that is associated with human vision. Welch´s method of power spectral estimation is implemented for estimating the power spectral of recorded signal. The result shows that the highest-power of brain response to repetitive visual stimulus can be detected either in the dark-room or in the bright-room.