RT Journal Article
T1 P300-Based Brain-Computer Interface Speller: usability evaluation of three speller sizes by severely motor-disabled patients
A1 Medina-Juliá, María Teresa
A1 Fernández-Rodríguez, Álvaro
A1 Velasco-Álvarez, Francisco Javier
A1 Ron-Angevin, Ricardo
A2 He, Bin
K1 Interfaces de ordenadores
K1 Interacción hombre-ordenador
AB Brain-computer interface (BCI) spellers allow severe motor-disabled patients to communicate using their brain activity without muscular mobility. Different visual configurations of the widely studied P300-based BCI speller had been assessed with healthy and motor-disabled users. However, the speller size (in terms of cm) had only been assessed for healthy subjects. We think that the speller size might be limiting for some severely motor-disabled patients with restricted head and eye movements. The usability of three speller sizes was assessed for seven patients diagnosed with amyotrophic lateral sclerosis (ALS) and a participant diagnosed with Duchenne muscular dystrophy (DMD). This is the first usability evaluation of speller size with severely motor-disabled participants. Effectiveness (in the online results) and efficiency (in the workload test) of the medium speller was remarkably better. Satisfaction was significantly the highest with the medium size speller and the lowest with the small size. These results correlate with previously described findings in healthy subjects. In conclusion, the speller size should be considered when designing a speller paradigm, especially for motor-disabled individuals, since it might affect their performance and user experience while controlling a BCI speller.
PB Frontiers Media
YR 2020
FD 2020-10-29
LK https://hdl.handle.net/10630/36162
UL https://hdl.handle.net/10630/36162
LA eng
NO Medina-Juliá MT, Fernández-Rodríguez Á, Velasco-Álvarez F and Ron-Angevin R (2020) P300-Based Brain-Computer Interface Speller: Usability Evaluation of Three Speller Sizes by Severely Motor-Disabled Patients. Front. Hum. Neurosci. 14:583358. doi: 10.3389/fnhum.2020.583358
NO This work was partially supported by the Spanish Ministry of Economy and Competitiveness through the project SICCAU: RTI2018-100912-B-I00 (MCIU/AEI/FEDER, UE) and by the University of Malaga (Universidad de Málaga).
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 19 ene 2026