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© 2020. This work is licensed under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.

Abstract

Tactile stimulation is less frequently used than visual for brain-computer interface (BCI) control, partly because of limitations in speed and accuracy. Non-visual BCI paradigms, however, may be required for patients who struggle with vision dependent BCIs because of a loss of gaze control. With the present study, we attempted to replicate earlier results by Herweg et al. (2016), with several minor adjustments and a focus on training effects and usability. We invited 16 healthy participants and trained them with a 4-class tactile P300-based BCI in five sessions. Their main task was to navigate a virtual wheelchair through a 3D apartment using the BCI. We found significant training effects on information transfer rate (ITR), which increased from a mean of 3.10 to 9.50 bits/min. Further, both online and offline accuracies significantly increased with training from 65 % to 86 % and 70 % to 95 %, respectively. We found only a descriptive increase of P300 amplitudes at Fz and Cz with training. Furthermore, we report subjective data from questionnaires, which indicated relatively high workload and moderate to high satisfaction. Although our participants have not achieved the same high performance as in the Herweg et al. 2016 study, we provide evidence for training effects on performance with a tactile BCI and confirm the feasibility of the paradigm.

Details

Title
Wheelchair Control in a Virtual Environment by Healthy Participants Using a P300-BCI Based on Tactile Stimulation: Training Effects and Usability
Author
Eidel, Matthias; Kübler, Andrea
Section
Original Research ARTICLE
Publication year
2020
Publication date
Jul 10, 2020
Publisher
Frontiers Research Foundation
e-ISSN
16625161
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2422262578
Copyright
© 2020. This work is licensed under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.