Chromatic and High-frequency cVEP-based BCI Paradigm
This work addresses safety concerns for users of brain-computer interfaces, particularly those prone to photosensitive epilepsy, though it is incremental as it builds on existing cVEP methods.
The researchers tackled the problem of photosensitive epilepsy risk in cVEP-based BCIs by developing a high-frequency, green-blue chromatic flashing paradigm, achieving comparable accuracies to conventional white-black flicker interfaces.
We present results of an approach to a code-modulated visual evoked potential (cVEP) based brain-computer interface (BCI) paradigm using four high-frequency flashing stimuli. To generate higher frequency stimulation compared to the state-of-the-art cVEP-based BCIs, we propose to use the light-emitting diodes (LEDs) driven from a small micro-controller board hardware generator designed by our team. The high-frequency and green-blue chromatic flashing stimuli are used in the study in order to minimize a danger of a photosensitive epilepsy (PSE). We compare the the green-blue chromatic cVEP-based BCI accuracies with the conventional white-black flicker based interface.