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Scenario Screen: A Dynamic and Context Dependent P300 Stimulator Screen Aimed at Wheelchair Navigation Control
Joint Authors
Yáñez-Suárez, Oscar
Piña-Ramirez, Omar
Valdés-Cristerna, Raquel
Source
Computational and Mathematical Methods in Medicine
Issue
Vol. 2018, Issue 2018 (31 Dec. 2018), pp.1-16, 16 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2018-02-14
Country of Publication
Egypt
No. of Pages
16
Main Subjects
Abstract EN
P300 spellers have been widely modified to implement nonspelling tasks.
In this work, we propose a “scenario” stimulation screen that is a P300 speller variation to command a wheelchair.
Our approach utilized a stimulation screen with an image background (scenario snapshot for a wheelchair) and stimulation markers arranged asymmetrically over relevant landmarks, such as suitable paths, doors, windows, and wall signs.
Other scenario stimulation screen features were green/blue stimulation marker color scheme, variable Interstimulus Interval, single marker stimulus mode, and optimized stimulus sequence generator.
Eighteen able-bodied subjects participated in the experiment; 78% had no experience in BCI usage.
A waveform feature analysis and a Mann–Whitney U test performed over the pairs of target and nontarget coherent averages confirmed that 94% of the subjects elicit P300 (p<.005) on this modified stimulator.
Least Absolute Shrinkage and Selection Operator optimization and Linear Discriminant Analysis were utilized for the automatic detection of P300.
For evaluation with unseen data, target detection was computed (median sensitivity = 1.00 (0.78–1.00)), together with nontarget discrimination (median specificity = 1.00 (0.98–1.00)).
The scenario screen adequately elicits P300 and seems suitable for commanding a wheelchair even when users have no previous experience on the BCI spelling task.
American Psychological Association (APA)
Piña-Ramirez, Omar& Valdés-Cristerna, Raquel& Yáñez-Suárez, Oscar. 2018. Scenario Screen: A Dynamic and Context Dependent P300 Stimulator Screen Aimed at Wheelchair Navigation Control. Computational and Mathematical Methods in Medicine،Vol. 2018, no. 2018, pp.1-16.
https://search.emarefa.net/detail/BIM-1132113
Modern Language Association (MLA)
Piña-Ramirez, Omar…[et al.]. Scenario Screen: A Dynamic and Context Dependent P300 Stimulator Screen Aimed at Wheelchair Navigation Control. Computational and Mathematical Methods in Medicine No. 2018 (2018), pp.1-16.
https://search.emarefa.net/detail/BIM-1132113
American Medical Association (AMA)
Piña-Ramirez, Omar& Valdés-Cristerna, Raquel& Yáñez-Suárez, Oscar. Scenario Screen: A Dynamic and Context Dependent P300 Stimulator Screen Aimed at Wheelchair Navigation Control. Computational and Mathematical Methods in Medicine. 2018. Vol. 2018, no. 2018, pp.1-16.
https://search.emarefa.net/detail/BIM-1132113
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1132113