Conference Proceeding Article
P300 speller is a communication tool with which one can input texts or commands to a computer by thought. The amplitude of the P300 evoked potential is inversely proportional to the probability of infrequent or task-related stimulus. In existing P300 spellers, rows and columns of a matrix are intensified successively and randomly, resulting in a stimulus frequency of 1/N (N is the number of rows or columns of the matrix). We propose a new paradigm to display each single character randomly and individually (therefore reducing the stimulus frequency to 1/(N*N)). On-line experiments showed that this new speller significantly improved the performance. Specifically, the new speller can reduce character classification error rate by up to 80% or double the information transfer rate compared to the existing P300 spellers. © 2004 IEEE.
Databases and Information Systems | Graphics and Human Computer Interfaces
Data Management and Analytics
2004 IEEE International Workshop on Biomedical Circuits & Systems: Singapore, 1-3 December 2004
City or Country
GUAN, Cuntai; THULASIDAS, Manoj; and WU, Jiankang.
High performance P300 speller for brain-computer interface. (2004). 2004 IEEE International Workshop on Biomedical Circuits & Systems: Singapore, 1-3 December 2004. 13-16. Research Collection School Of Information Systems.
Available at: http://ink.library.smu.edu.sg/sis_research/3497
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