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rapid-serial-visual-presentation--rsvp
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Design and Implementation of a P-300 Speller using RSVP Paradigm
, M.Sc. Thesis Sharif University of Technology ; Shamsollahi, Mohammad Bagher (Supervisor)
Abstract
The brain-computer interface is an advanced technology in human-machine interaction. The Speller system is a typical use of BCI, in which the target stimulation is detected by the induced signal in the brain. The most commonly speller system, the matrix Speller, has a major disadvantage, and it is Gaze-dependent. Research has proven that target-character selection in the matrix Speller is dependent on eye movement, or as referred to in technical terminology, it is gaze dependent. Therefore, the Speller matrix is not usable for users suffering from unimpaired oculomotor control. Many researchers attempted to overcome this issue, and their results led to two solutions; 1) changing the type of...
Comparison between single, dual and triple rapid serial visual presentation paradigms for P300 speller
, Article Proceedings - 2018 IEEE International Conference on Bioinformatics and Biomedicine, BIBM 2018, 3 December 2018 through 6 December 2018 ; 2019 , Pages 2635-2638 ; 9781538654880 (ISBN) ; Shamsollahi, M. B ; Sheikh Hassani, M ; Jalilpour, S ; Schmidt H ; Griol D ; Wang H ; Baumbach J ; Zheng H ; Callejas Z ; Hu X ; Dickerson J ; Zhang L ; Sharif University of Technology
Institute of Electrical and Electronics Engineers Inc
2019
Abstract
P300 based Speller systems are a typical application of BCIs that can be used as a communication device for users with spinal cord injury. In this paper, three different RSVP paradigms; single, dual and triple RSVP are compared in terms of character detection accuracy and ITR to find the optimal communication method for these users. Three subjects were tested to compare these methods in offline mode. The results of this comparison shows that character detection accuracy for the single, dual and triple RSVP paradigms are 0.78, 0.63 and 0.64, respectively. The mean of ITR for the single, dual and triple RSVP paradigms was also recorded to be 3.6534, 7.72 and 11.5 bit/min, respectively....
A novel dual and triple shifted RSVP paradigm for P300 speller
, Article Journal of Neuroscience Methods ; Volume 328 , 2019 ; 01650270 (ISSN) ; Shamsollahi, M. B ; Sheikh Hassani, M ; Sharif University of Technology
Elsevier B.V
2019
Abstract
Background: A speller system enables disabled people, specifically those with spinal cord injuries, to visually select and spell characters. A problem of primary speller systems is that they are gaze shift dependent. To overcome this problem, a single Rapid Serial Visual Presentation (RSVP) paradigm was initially introduced in which characters are displayed one-by-one at the center of a screen. New method: Two new protocols, Dual and Triple shifted RSVP paradigms, are introduced and compared against the single paradigm. In the Dual and Triple paradigms, two and three characters are displayed at the center of the screen simultaneously, holding the advantage of displaying the target character...
A novel hybrid BCI speller based on RSVP and SSVEP paradigm
, Article Computer Methods and Programs in Biomedicine ; Volume 187 , April , 2020 ; Hajipour Sardouie, S ; Mijani, A ; Sharif University of Technology
Elsevier Ireland Ltd
2020
Abstract
Background and objective: Steady-state visual evoked potential (SSVEP) and rapid serial visual presentation (RSVP) are useful methods in the brain-computer interface (BCI) systems. Hybrid BCI systems that combine these two approaches can enhance the proficiency of the P300 spellers. Methods: In this study, a new hybrid RSVP/SSVEP BCI is proposed to increase the classification accuracy and information transfer rate (ITR) as compared with the other RSVP speller paradigms. In this paradigm, RSVP (eliciting a P300 response) and SSVEP stimulations are presented in such a way that the target group of characters is identified by RSVP stimuli, and the target character is recognized by SSVEP stimuli....