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    Effects of spatial stimulus overlap in a visual P300-based brain-computer interface

    • Autor
      Fernández-Rodríguez, ÁlvaroAutoridad Universidad de Málaga; Medina-Juliá, María Teresa; Velasco-Álvarez, Francisco JavierAutoridad Universidad de Málaga; Ron-Angevin, RicardoAutoridad Universidad de Málaga
    • Fecha
      2020-02-18
    • Editorial/Editor
      Elsevier
    • Palabras clave
      Circuitos de interfaces
    • Resumen
      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.
    • URI
      https://hdl.handle.net/10630/33734
    • DOI
      https://dx.doi.org/10.1016/j.neuroscience.2020.02.011
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    rsvp_distance_preprint.pdf (588.7Kb)
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    REPOSITORIO INSTITUCIONAL UNIVERSIDAD DE MÁLAGA
    REPOSITORIO INSTITUCIONAL UNIVERSIDAD DE MÁLAGA
     

     

    REPOSITORIO INSTITUCIONAL UNIVERSIDAD DE MÁLAGA
    REPOSITORIO INSTITUCIONAL UNIVERSIDAD DE MÁLAGA