Projected accuracy metric for the P300 Speller.
Journal Article
The P300 Speller brain-computer interface (BCI) is a virtual keyboard that allows users to type without requiring neuromuscular control. P300 Speller research commonly aims to improve the system accuracy, which is typically estimated by spelling a small number of characters and calculating the percent spelled correctly. In this paper we introduce a new method for estimating the long-term ("projected") accuracy, which utilizes all available flash data and a probabilistic model of the Speller system to produce an estimate with lower variance and lower granularity than the standard measure. We apply the new method to 110 previously-collected P300 Speller runs to confirm its consistency, and simulate spelling runs from real subject data to demonstrate lower variance on the accuracy estimate for any given amount of data.
Full Text
Duke Authors
Cited Authors
- Colwell, K; Throckmorton, C; Collins, L; Morton, K
Published Date
- September 2014
Published In
Volume / Issue
- 22 / 5
Start / End Page
- 921 - 925
PubMed ID
- 25203496
Pubmed Central ID
- 25203496
Electronic International Standard Serial Number (EISSN)
- 1558-0210
International Standard Serial Number (ISSN)
- 1534-4320
Digital Object Identifier (DOI)
- 10.1109/tnsre.2014.2324892
Language
- eng