Title

Brain-Computer Interface Research at the University of South Florida Cognitive Psychophysiology Laboratory: The P300 Speller

Document Type

Article

Publication Date

6-2006

Keywords

Psychology, Laboratories, Biomedical imaging, Enterprise resource planning, Displays, Keyboards, Pediatrics, Humans, Biomedical engineering, Systems engineering and theory

Digital Object Identifier (DOI)

https://doi.org/10.1109/TNSRE.2006.875580

Abstract

We describe current efforts to implement and improve P300-BCI communication tools. The P300 Speller first described by Farwell and Donchin (in 1988) adapted the so-called oddball paradigm (OP) as the operating principle of the brain-computer interface (BCI) and was the first P300-BCI. The system operated by briefly intensifying each row and column of a matrix and the attended row and column elicited a P300 response. This paradigm has been the benchmark in P300-BCI systems, and in the past few years the P300 Speller paradigm has been solidified as a promising communication tool. While promising, we have found that some people who have amyotrophic lateral sclerosis (ALS) would be better suited with a system that has a limited number of choices, particularly if the 6/spl times/6 matrix is difficult to use. Therefore, we used the OP to implement a four-choice system using the commands: Yes, No, Pass, and End; we also used three presentation modes: auditory, visual, and auditory and visual. We summarize results from both paradigms and also discuss obstacles we have identified while working with the ALS population outside of the laboratory environment.

Was this content written or created while at USF?

Yes

Citation / Publisher Attribution

IEEE Transactions on Neural Systems and Rehabilitation Engineering, v. 14, issue 2, p. 221-224

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