An efficient ERP-based brain-computer interface using random set presentation and face familiarity.
Event-related potential (ERP)-based P300 spellers are commonly used in the field of brain-computer interfaces as an alternative channel of communication for people with severe neuro-muscular diseases. This study introduces a novel P300 based brain-computer interface (BCI) stimulus paradigm using a random set presentation pattern and exploiting the effects of face familiarity. The effect of face familiarity is widely studied in the cognitive neurosciences and has recently been addressed for the purpose of BCI. In this study we compare P300-based BCI performances of a conventional row-column (RC)-based paradigm with our approach that combines a random set presentation paradigm with (non-) self-face stimuli. Our experimental results indicate stronger deflections of the ERPs in response to face stimuli, which are further enhanced when using the self-face images, and thereby improving P300-based spelling performance. This lead to a significant reduction of stimulus sequences required for correct character classification. These findings demonstrate a promising new approach for improving the speed and thus fluency of BCI-enhanced communication with the widely used P300-based BCI setup.
Department of Brain and Cognitive Engineering, Korea University, Seoul, Republic of Korea.
Seul-Ki
SK
Yeom
Department of Brain and Cognitive Engineering, Korea University, Seoul, Republic of Korea.
Siamac
S
Fazli
Department of Brain and Cognitive Engineering, Korea University, Seoul, Republic of Korea; Machine Learning Group, Berlin Institute of Technology, Berlin, Germany.
Klaus-Robert
KR
Müller
Department of Brain and Cognitive Engineering, Korea University, Seoul, Republic of Korea.
Seong-Whan
SW
Lee
D000328:Adult; D062207:Brain-Computer Interfaces; D018913:Event-Related Potentials, P300 / Q000502:physiology*; D005145:Face; D006801:Humans; D008297:Male; D008962:Models, Theoretical; D010364:Pattern Recognition, Visual / Q000502:physiology*; D010775:Photic Stimulation; D021641:Recognition, Psychology / Q000502:physiology*