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Research
Prof. Seong-Whan Lee's paper accepted in IEEE Trans. on Neural Systems and Rehabilitation Engineering
Author Administrator (IP: *.152.74.116) Date 2017-08-02 10:25 Views 414
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Prof. Seong-Whan Lee's new research, Motion-based Rapid Serial Visual Presentation for Gaze-Independent Brain-Computer Interfaces was accepted in IEEE Trans. on Neural Systems and Rehabilitation Engineering.

 

Title: Motion-based Rapid Serial Visual Presentation for Gaze-Independent Brain-Computer Interfaces 

 

Abstract: Most event-related potential (ERP)-based brain-computer interface (BCI) spellers primarily use matrix layouts, and generally require moderate eye movement for successful operation. The fundamental objective of this study is to enhance the perceptibility of target characters by introducing motion stimuli to classical rapid serial visual presentation (RSVP) spellers that do not require any eye movement, thereby applying them to paralyzed patients with oculomotor dysfunctions. To test the feasibility of the proposed motion-based RSVP paradigm, we implemented three RSVP spellers: i) fixed-direction motion (FM-RSVP), ii) random-direction motion (RM-RSVP), and iii) (the conventional) non-motion stimulation (NM-RSVP), and evaluated the effect of the three different stimulation methods on spelling performance. The two motion-based stimulation methods, FM- and RM-RSVP, showed shorter P300 latency and higher P300 amplitudes than the NM-RSVP. This led to higher and more stable performances for FM- and RM-RSVP spellers than NM-RSVP speller. In particular, the proposed motion-based RSVP paradigm was significantly beneficial for about half of the subjects who might not accurately perceive rapidly presented static stimuli. These results indicate that the use of proposed motion-based RSVP paradigm is more beneficial for target recognition when developing BCI applications for severely paralyzed patients with complex ocular dysfunctions.



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Research
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