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The cost of space independence in P300-BCI spellers
BACKGROUND: Though non-invasive EEG-based Brain Computer Interfaces (BCI) have been researched extensively over the last two decades, most designs require control of spatial attention and/or gaze on the part of the user. METHODS: In healthy adults, we compared the offline performance of a space-inde...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
BioMed Central
2013
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3733823/ https://www.ncbi.nlm.nih.gov/pubmed/23895406 http://dx.doi.org/10.1186/1743-0003-10-82 |
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author | Chennu, Srivas Alsufyani, Abdulmajeed Filetti, Marco Owen, Adrian M Bowman, Howard |
author_facet | Chennu, Srivas Alsufyani, Abdulmajeed Filetti, Marco Owen, Adrian M Bowman, Howard |
author_sort | Chennu, Srivas |
collection | PubMed |
description | BACKGROUND: Though non-invasive EEG-based Brain Computer Interfaces (BCI) have been researched extensively over the last two decades, most designs require control of spatial attention and/or gaze on the part of the user. METHODS: In healthy adults, we compared the offline performance of a space-independent P300-based BCI for spelling words using Rapid Serial Visual Presentation (RSVP), to the well-known space-dependent Matrix P300 speller. RESULTS: EEG classifiability with the RSVP speller was as good as with the Matrix speller. While the Matrix speller’s performance was significantly reliant on early, gaze-dependent Visual Evoked Potentials (VEPs), the RSVP speller depended only on the space-independent P300b. However, there was a cost to true spatial independence: the RSVP speller was less efficient in terms of spelling speed. CONCLUSIONS: The advantage of space independence in the RSVP speller was concomitant with a marked reduction in spelling efficiency. Nevertheless, with key improvements to the RSVP design, truly space-independent BCIs could approach efficiencies on par with the Matrix speller. With sufficiently high letter spelling rates fused with predictive language modelling, they would be viable for potential applications with patients unable to direct overt visual gaze or covert attentional focus. |
format | Online Article Text |
id | pubmed-3733823 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2013 |
publisher | BioMed Central |
record_format | MEDLINE/PubMed |
spelling | pubmed-37338232013-08-06 The cost of space independence in P300-BCI spellers Chennu, Srivas Alsufyani, Abdulmajeed Filetti, Marco Owen, Adrian M Bowman, Howard J Neuroeng Rehabil Research BACKGROUND: Though non-invasive EEG-based Brain Computer Interfaces (BCI) have been researched extensively over the last two decades, most designs require control of spatial attention and/or gaze on the part of the user. METHODS: In healthy adults, we compared the offline performance of a space-independent P300-based BCI for spelling words using Rapid Serial Visual Presentation (RSVP), to the well-known space-dependent Matrix P300 speller. RESULTS: EEG classifiability with the RSVP speller was as good as with the Matrix speller. While the Matrix speller’s performance was significantly reliant on early, gaze-dependent Visual Evoked Potentials (VEPs), the RSVP speller depended only on the space-independent P300b. However, there was a cost to true spatial independence: the RSVP speller was less efficient in terms of spelling speed. CONCLUSIONS: The advantage of space independence in the RSVP speller was concomitant with a marked reduction in spelling efficiency. Nevertheless, with key improvements to the RSVP design, truly space-independent BCIs could approach efficiencies on par with the Matrix speller. With sufficiently high letter spelling rates fused with predictive language modelling, they would be viable for potential applications with patients unable to direct overt visual gaze or covert attentional focus. BioMed Central 2013-07-29 /pmc/articles/PMC3733823/ /pubmed/23895406 http://dx.doi.org/10.1186/1743-0003-10-82 Text en Copyright © 2013 Chennu et al.; licensee BioMed Central Ltd. http://creativecommons.org/licenses/by/2.0 This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Research Chennu, Srivas Alsufyani, Abdulmajeed Filetti, Marco Owen, Adrian M Bowman, Howard The cost of space independence in P300-BCI spellers |
title | The cost of space independence in P300-BCI spellers |
title_full | The cost of space independence in P300-BCI spellers |
title_fullStr | The cost of space independence in P300-BCI spellers |
title_full_unstemmed | The cost of space independence in P300-BCI spellers |
title_short | The cost of space independence in P300-BCI spellers |
title_sort | cost of space independence in p300-bci spellers |
topic | Research |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3733823/ https://www.ncbi.nlm.nih.gov/pubmed/23895406 http://dx.doi.org/10.1186/1743-0003-10-82 |
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