Optimization of BCI speller based on P300 potential

We report our studies on a Brain Computer Interface (BCI) speller application with an aim to optimize its performance and usability. We study the dependence of the spelling accuracy as a function of (a) the number of visual stimuli (repetitions) presented to the user, (b) the P300 segment length use...

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Main Authors: THULASIDAS, Manoj, GUAN, Cuntai
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Language:English
Published: Institutional Knowledge at Singapore Management University 2005
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Online Access:https://ink.library.smu.edu.sg/sis_research/3495
http://doi.org/10.1109/IEMBS.2005.1615702
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spelling sg-smu-ink.sis_research-44962017-08-24T05:37:53Z Optimization of BCI speller based on P300 potential THULASIDAS, Manoj GUAN, Cuntai We report our studies on a Brain Computer Interface (BCI) speller application with an aim to optimize its performance and usability. We study the dependence of the spelling accuracy as a function of (a) the number of visual stimuli (repetitions) presented to the user, (b) the P300 segment length used, (c) the number of channels used, and (d) the amount of data used in training, in terms of the number of characters and repetitions. Reducing the number of repetitions results in a direct reduction of the time needed to spell a character, while minimizing the number of channels translates to shorter subject preparation time and thus improves the usability of the system. The usability is further enhanced by decreasing the training required, while maintaining the accuracy. We show that very high accuracies of the order of 99% can be achieved with a short training session of less than 10 minutes using only about 10 channels. The high accuracies, short training and preparation time requirements along with real-time performance make this BCI speller a viable communication tool for severely disabled individuals, who have no other means to communicate with the external world. 2005-09-01T07:00:00Z text https://ink.library.smu.edu.sg/sis_research/3495 info:doi/10.1109/IEMBS.2005.1615702 http://doi.org/10.1109/IEMBS.2005.1615702 Research Collection School Of Computing and Information Systems eng Institutional Knowledge at Singapore Management University Brain models Handicapped persons Learning systems Optimization Patient rehabilitation Databases and Information Systems Graphics and Human Computer Interfaces
institution Singapore Management University
building SMU Libraries
continent Asia
country Singapore
Singapore
content_provider SMU Libraries
collection InK@SMU
language English
topic Brain models
Handicapped persons
Learning systems
Optimization
Patient rehabilitation
Databases and Information Systems
Graphics and Human Computer Interfaces
spellingShingle Brain models
Handicapped persons
Learning systems
Optimization
Patient rehabilitation
Databases and Information Systems
Graphics and Human Computer Interfaces
THULASIDAS, Manoj
GUAN, Cuntai
Optimization of BCI speller based on P300 potential
description We report our studies on a Brain Computer Interface (BCI) speller application with an aim to optimize its performance and usability. We study the dependence of the spelling accuracy as a function of (a) the number of visual stimuli (repetitions) presented to the user, (b) the P300 segment length used, (c) the number of channels used, and (d) the amount of data used in training, in terms of the number of characters and repetitions. Reducing the number of repetitions results in a direct reduction of the time needed to spell a character, while minimizing the number of channels translates to shorter subject preparation time and thus improves the usability of the system. The usability is further enhanced by decreasing the training required, while maintaining the accuracy. We show that very high accuracies of the order of 99% can be achieved with a short training session of less than 10 minutes using only about 10 channels. The high accuracies, short training and preparation time requirements along with real-time performance make this BCI speller a viable communication tool for severely disabled individuals, who have no other means to communicate with the external world.
format text
author THULASIDAS, Manoj
GUAN, Cuntai
author_facet THULASIDAS, Manoj
GUAN, Cuntai
author_sort THULASIDAS, Manoj
title Optimization of BCI speller based on P300 potential
title_short Optimization of BCI speller based on P300 potential
title_full Optimization of BCI speller based on P300 potential
title_fullStr Optimization of BCI speller based on P300 potential
title_full_unstemmed Optimization of BCI speller based on P300 potential
title_sort optimization of bci speller based on p300 potential
publisher Institutional Knowledge at Singapore Management University
publishDate 2005
url https://ink.library.smu.edu.sg/sis_research/3495
http://doi.org/10.1109/IEMBS.2005.1615702
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