A New Single Trial P300 Classification Method
Document Type
Article
Publication Date
2014
Keywords
Communication, Kolmogorov-Smirnov Test, P300 based Brain Computer Interface, TwoSample T-Test, Variance Analysis
Digital Object Identifier (DOI)
https://doi.org/10.4018/jehmc.2012100103
Abstract
P300-Spelleris one ofthemost practical andwidely usedBrainComputerInterface (BCI)forlocked-in people who are not able to communicatewith others via traditional communication methods. Many signal processing techniques have been utilized in P300-Speller to restore the communication ability of these locked-in people. These techniques are capable of achieving high classification accuracy. However the classification accuracy dramatically decreases for single trial analysis. The reason for that is that the noises existing in the recorded signals are usually removed by averaging several trials. When only a single trial is available, averaging is no longer an option for de-noising. The “averaging” step becomes the bottle neck of P300 response detection which highly limits the processing speed. Researchers are looking for techniques that can accomplish the classification task in a single trial. In this work, a new, effective but simple processing technique for single trial electroencephalography (EEG) classification using variance analysis based method is presented. This method achieved an overall accuracy of 84.8% forsingle trial P300 response identification. When compared with a single trial stepwise linear discriminant analysis (SWLDA), the authors’ method in terms of overall accuracy is more accurate and the data communication speed is significantly improved.
Was this content written or created while at USF?
Yes
Citation / Publisher Attribution
International Journal of E-Health and Medical Communications, v. 3, issue 4, p. 31-41
Scholar Commons Citation
Li, Kun; Sankar, Ravi; Cao, Ke; Arbel, Yael; and Donchin, Emanuel, "A New Single Trial P300 Classification Method" (2014). Psychology Faculty Publications. 357.
https://digitalcommons.usf.edu/psy_facpub/357
