RT Journal Article
T1 Effects of spatial stimulus overlap in a visual P300-based brain-computer interface
A1 Fernández-Rodríguez, Álvaro
A1 Medina-Juliá, María Teresa
A1 Velasco-Álvarez, Francisco Javier
A1 Ron-Angevin, Ricardo
K1 Circuitos de interfaces
AB The rapid serial visual presentation (RSVP) paradigm seems to be one of the most appropriate for patients using P300-based brain-computer interface applications, since non-ocular movements are required. However, according to previous works, the use of different locations for each stimulus may improve performance. Thus, the aim of the present work is to explore how spatial overlap between stimuli influences performance in controlling a visual P300-based BCI. Nineteen participants were tested using four levels of overlap between two stimuli: 100%, 66.7%, 33.3% and 0%. Significant differences in accuracy were found between the 0% overlapped condition and all the other conditions, and between 33.3% and higher overlap (66.7% and 100%). These results can be explained due to a modulation in the non-target stimulus amplitude signal caused by the overlapping factor. In short, the stimulus overlap provokes a modulation in performance using a P300-based BCI; this should be considered in future BCI proposals in which an optimal surface exploitation is convenient and potential users have only residual ocular movement.
PB Elsevier
YR 2020
FD 2020-02-18
LK https://hdl.handle.net/10630/33734
UL https://hdl.handle.net/10630/33734
LA eng
NO Fernández-Rodríguez Á, Medina-Juliá MT, Velasco-Álvarez F, Ron-Angevin R. Effects of Spatial Stimulus Overlap in a Visual P300-based Brain-computer Interface. Neuroscience. 2020 Apr 1;431:134-142. doi: 10.1016/j.neuroscience.2020.02.011. Epub 2020 Feb 18. PMID: 32081721.
NO This work was partially supported by the project entitled SICCAU: RTI2018-100912-B-I00 (MCIU/AEI/FEDER, UE) and by the University of Malaga.
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 19 ene 2026