Visual tracking brain computer interface
This addresses the limitation of discrete control in BCIs for users needing natural interaction, such as in painting and gaming applications, representing a novel method rather than an incremental improvement.
The study tackled the problem of enabling continuous control in non-invasive EEG-based visual brain-computer interfaces by implementing a novel spatial encoding stimulus paradigm and projection method, achieving Fitt's ITR of 0.55 bps for fixed tracking and 0.37 bps for random tracking tasks.
Brain-computer interfaces (BCIs) offer a way to interact with computers without relying on physical movements. Non-invasive electroencephalography (EEG)-based visual BCIs, known for efficient speed and calibration ease, face limitations in continuous tasks due to discrete stimulus design and decoding methods. To achieve continuous control, we implemented a novel spatial encoding stimulus paradigm and devised a corresponding projection method to enable continuous modulation of decoded velocity. Subsequently, we conducted experiments involving 17 participants and achieved Fitt's ITR of 0.55 bps for the fixed tracking task and 0.37 bps for the random tracking task. The proposed BCI with a high Fitt's ITR was then integrated into two applications, including painting and gaming. In conclusion, this study proposed a visual BCI-based control method to go beyond discrete commands, allowing natural continuous control based on neural activity.