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The cost of space independence in P300-BCI spellers.

Chennu, Srivas, Alsufyani, Abdulmajeed, Filetti, Marco, Owen, Adrian, Bowman, Howard (2013) The cost of space independence in P300-BCI spellers. Journal of NeuroEngineering and Rehabilitation, 10 (82). pp. 1-13. ISSN 1743-0003. (doi:10.1186/1743-0003-10-82) (KAR id:34935)

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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

language modelling, they would be viable for potential applications with patients unable to direct overt visual gaze or covert attentional focus.

Item Type: Article
DOI/Identification number: 10.1186/1743-0003-10-82
Uncontrolled keywords: RSVP Speller BCI, Matrix P300 Speller BCI, Space-independence, Gaze-independence, Rapid serial visual presentation.
Subjects: Q Science > Q Science (General)
Divisions: Faculties > Sciences > School of Computing > Computational Intelligence Group
Depositing User: Howard Bowman
Date Deposited: 06 Aug 2013 11:23 UTC
Last Modified: 09 Feb 2020 04:05 UTC
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