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Toward the Optimization of the region-Based P300 Speller

Computers, Materials & Continua 2021年第4期67卷 1169-1189页

作者： A.Benabid Najjar N.AlSahly r.alshamass M.Hosny Department of Software Engineering King Saud UniversityRiyadh11451Saudi Arabia Department of Computer Science King Saud UniversityRiyadh11451Saudi Arabia

Technology has tremendously contributed to improving communication and facilitating daily ***-Computer Interface(BCI)study particularly emerged from the need to serve people with disabilities such as Amyotrophic Lateral Sclerosis(ALS).However,with the advancements in cost-effective electronics and computer interface equipment,the BCI study is flourishing,and the exploration of BCI applications for people without disabilities,to enhance normal functioning,is ***,the P300-based spellers are among the most promising applications of the BCI *** this context,the region-based paradigm for P300 BCI spellers was introduced in an effort to reduce the crowding effect and adjacency problem that might affect the detection of P300 *** study extends this line of research by investigating the effect,in terms of accuracy and usability,of the letters’distribution among the speller’s *** this purpose,a clustering algorithm is proposed,and two region-based layouts were generated by redistributing the letters based on their dissimilarity or their similarity.A pilot usability evaluation was also conducted in order to assess the usability of the different layouts in terms of effectiveness,efficiency,and *** results indicate that the distribution of the letters has an effect on the classification accuracy as well as the user ***,when considering short-term accuracy and cognitive effort,the original region-based layout outperforms other layouts.

关键词： Optimization clustering usability evaluation BCI region-based P300 speller

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