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Evaluation of a P300 Brain-Computer Interface Using Different Sets of Flashing Stimuli

Authors:
Álvaro Fernández-Rodríguez
Francisco Velasco-Álvarez
Ricardo Ron-Angevin

Keywords: Brain-computer interfaces (BCI); P300; speller; stimuli; evaluation.

Abstract:
Thanks to brain-computer interface systems, patients with muscular impairments could have control of a device to communicate with people and manipulate their environment using only their brain signals, without the need of any muscular activity. The present preliminary study with four subjects is focused on the control of a 3x4 P300-based speller matrix which allows users to write and communicate. Seven different types of flashing stimuli were used to highlight the letters: i) white letters, ii) colored letters, iii) white blocks, iv) colored blocks, v) neutral pictures, vi) positive and excitatory pictures, and vii) negative and excitatory pictures. These preliminary results showed that conditions with pictures could offer the best performance, specially the set of negative and excitatory pictures. Regarding the other conditions, those ones with blocks presented better results than the standard letter paradigm.

Pages: 1 to 4

Copyright: Copyright (c) IARIA, 2018

Publication date: June 24, 2018

Published in: conference

ISSN: 2519-8653

ISBN: 978-1-61208-649-1

Location: Venice, Italy

Dates: from June 24, 2018 to June 28, 2018