RT Conference Proceedings
T1 Exploring the impact of stimulus transparency in ERP-BCI under RSVP.
A1 Fernández-Rodríguez, Álvaro
A1 Velasco-Álvarez, Francisco Javier
A1 Alvarez, Chloé
A1 Langin, Célia
A1 Letouzé, Théodore
A1 André, Jean-Marc
A1 Ron-Angevin, Ricardo
K1 Interfaces cerebro-ordenador
AB Rapid serial visual presentation (RSVP) is currently one of the mostsuitable paradigms for implementing a visual brain–computer interfacebased on event-related potentials (ERP-BCI) for patients withlimited ocular motility. This paradigm presents stimuli centeredin the user’s field of vision, which may hinder the patient fromattending to other elements on the screen. A potential solution tothis could be the use of semi-transparent stimuli, allowing both thestimulus and the background to be perceived. Therefore, the objectiveof this study is to evaluate the impact of stimulus transparencyon ERP-BCI performance under the RSVP paradigm. Five participantstested the ERP-BCI under RSVP using three different stimulustransparencies with alpha channels set to 255 (C1), 85 (C2), and 28(C3). The results showed the following average BCI classificationaccuracies: C1, 70%; C2, 74.67%; and C3, 60.67%. Although the analysesdid not reveal significant differences, the results suggest thatthe transparency level should be carefully manipulated to maintaina balance between stimulus transparency and performance, withC2 even exhibiting the highest accuracy among the conditions. Thisfinding should be considered by future ERP-BCI proposals aimedat users who need gaze-independent systems.
PB ACM Library Digital
YR 2024
FD 2024
LK https://hdl.handle.net/10630/32068
UL https://hdl.handle.net/10630/32068
LA eng
NO Álvaro Fernández-Rodríguez, Chloé Álvarez, Celia Langin, Francisco Velasco-Álvarez, Theodore Letouze, Jean-Marc Andre, and Ricardo Ron-Angevin. 2024. Exploring the impact of stimulus transparency in ERP-BCI under RSVP. In Proceedings of the 17th International Conference on PErvasive Technologies Related to Assistive Environments (PETRA '24). Association for Computing Machinery, New York, NY, USA, 9–14. https://doi.org/10.1145/3652037.3652045
NO Política de acceso abierto tomada de: https://authors.acm.org/author-resources/author-rights
NO Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 19 ene 2026