Usability of video-overlaying SSVEP based BCIs

Abstract

This work investigates the usability of an steady-state visual evoked potentials (SSVEP) based brain-computer interface (BCI) with on-screen stimulation. The BCI controls were displayed with an underlying feedback video. Each control had a unique flashing frequency. For classification a combination of minimum energy (ME) and linear discriminant analysis (LDA) was used. Two experiments showed that the use of overlaying controls is possible, but also decreasing the performance.