Overlap and refractory effects in a Brain-Computer Interface speller based on 
the visual P300 Event-Related Potential

Martens, SMM; Hill, NJ; Farquhar, J; Schölkopf, B

doi:10.1088/1741-2560/6/2/026003

Item

ITEM ACTIONSEXPORT

Add to Basket

Local TagsRelease HistoryDetailsSummary

Released

Journal Article

Overlap and refractory effects in a Brain-Computer Interface speller based on the visual P300 Event-Related Potential

MPS-Authors

/persons/resource/persons84076

Martens, SMM
Department Empirical Inference, Max Planck Institute for Biological Cybernetics, Max Planck Society;
Max Planck Institute for Biological Cybernetics, Max Planck Society;

/persons/resource/persons83968

Hill, NJ
Department Empirical Inference, Max Planck Institute for Biological Cybernetics, Max Planck Society;
Max Planck Institute for Biological Cybernetics, Max Planck Society;

/persons/resource/persons84193

Schölkopf, B
Department Empirical Inference, Max Planck Institute for Biological Cybernetics, Max Planck Society;
Max Planck Institute for Biological Cybernetics, Max Planck Society;

External Resource

http://iopscience.iop.org/article/10.1088/1741-2560/6/2/026003/pdf
(Publisher version)

Fulltext (restricted access)

There are currently no full texts shared for your IP range.

Fulltext (public)

There are no public fulltexts stored in PuRe

Supplementary Material (public)

There is no public supplementary material available

Citation

Martens, S., Hill, N., Farquhar, J., & Schölkopf, B. (2009). Overlap and refractory effects in a Brain-Computer Interface speller based on the visual P300 Event-Related Potential. Journal of Neural Engineering, 6(2): 026003, pp. 1-9. doi:10.1088/1741-2560/6/2/026003.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0013-C52B-1

Abstract

We reveal the presence of refractory and overlap effects in the event-related potentials in visual P300 speller datasets, and we show their negative impact on the performance of the system. This finding has important implications for how to encode the letters that can be selected for communication. However, we show that such effects are dependent on stimulus parameters: an alternative stimulus type based on apparent motion suffers less from the refractory effects and leads to an improved letter prediction performance.