Publication Type

Conference Proceeding Article

Publication Date

12-2004

Abstract

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.

Discipline

Databases and Information Systems | Graphics and Human Computer Interfaces

Research Areas

Data Management and Analytics

Publication

2004 IEEE International Workshop on Biomedical Circuits & Systems: Singapore, 1-3 December 2004

First Page

13

Last Page

16

ISBN

9780780386655

Identifier

10.1109/BIOCAS.2004.1454155

Publisher

IEEE

City or Country

Piscataway, NJ

Creative Commons License

Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.

Additional URL

http://doi.org/10.1109/BIOCAS.2004.1454155

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