Effects of Stimulus Type and of Error-Correcting Code Design on BCI Speller 
Performance

Hill, J; Farquhar, J; Martens, SMM; Biessmann, F; Schölkopf, B

Effects of Stimulus Type and of Error-Correcting Code Design on BCI Speller Performance

Hill, J., Farquhar, J., Martens, S., Biessmann, F., & Schölkopf, B. (2009). Effects of Stimulus Type and of Error-Correcting Code Design on BCI Speller Performance. In D., Koller, D., Schuurmans, Y., Bengio, & L., Bottou (Eds.), Advances in neural information processing systems 21 (pp. 665-672). Red Hook, NY, USA: Curran.

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アイテムのパーマリンク: https://hdl.handle.net/11858/00-001M-0000-0013-C47B-4 版のパーマリンク: https://hdl.handle.net/21.11116/0000-0002-DE64-4

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Hill, J^{1, 2}, 著者
Farquhar, J, 著者
Martens, SMM^{1, 2}, 著者
Biessmann, F^{2, 3}, 著者
Schölkopf, B^{1, 2}, 著者

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1Department Empirical Inference, Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497795
2Max Planck Institute for Biological Cybernetics, Max Planck Society, Spemannstrasse 38, 72076 Tübingen, DE, ou_1497794
3Department Physiology of Cognitive Processes, Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497798

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要旨: From an information-theoretic perspective, a noisy transmission system such as a visual Brain-Computer Interface (BCI) speller could benefit from the use of errorcorrecting codes. However, optimizing the code solely according to the maximal minimum-Hamming-distance criterion tends to lead to an overall increase in target frequency of target stimuli, and hence a significantly reduced average
target-to-target interval (TTI), leading to difficulties in classifying the individual event-related potentials (ERPs) due to overlap and refractory effects. Clearly any change to the stimulus setup must also respect the possible psychophysiological consequences. Here we report new EEG data from experiments in which we explore stimulus types and codebooks in a within-subject design, finding an interaction between the two factors. Our data demonstrate that the traditional, rowcolumn code has particular spatial properties that lead to better performance than one would expect from its TTIs and Hamming-distances alone, but nonetheless error-correcting codes can improve performance provided the right stimulus type is used.

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日付: 出版: 2009-06

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識別子（DOI, ISBNなど）: BibTex参照ID: 5433

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出版物名: Advances in neural information processing systems 21

種別: 会議論文集

著者・編者:
Koller, D, 編集者
Schuurmans, D, 編集者
Bengio, Y, 編集者
Bottou, L, 編集者

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出版社, 出版地: Red Hook, NY, USA : Curran

ページ: - 巻号: - 通巻号: - 開始・終了ページ: 665 - 672 識別子（ISBN, ISSN, DOIなど）: ISBN: 978-1-60560-949-2

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