Combining Auditory and Visual Stimuli to Improve the Performance of Covert Attention-based BCIs
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2019-07-07
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en
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Abstract
Brain-Computer Interface (BCI) spellers allow
their users to communicate with the outside
world without moving or speaking. The ac-
curacy of well-known BCI spellers such as the
matrix speller and the Hex-o-Spell interface has
been shown rely on eye gaze (overt attention): if
directing gaze to attended options is prohibited,
their accuracy drops signi cantly. In this paper,
we perform a pilot experiment to test whether
the performance of a visual covert attention-
based BCI (in which eye movements are not
allowed) can be improved by adding auditory
stimuli. We tested two conditions (visual-only
vs. visual and auditory stimuli) for a P300-
based variant of this type of BCI. For the 4
subjects we tested, adding auditory stimuli did
not have a large e ect on classi er performance.
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Faculteit der Sociale Wetenschappen