Degree Name
MA (Master of Arts)
Program
Psychology
Date of Award
8-2011
Committee Chair or Co-Chairs
Eric W. Sellers
Committee Members
Russell W. Brown, Nathan A. Gates, Chad E. Lakey
Abstract
Individuals who suffer from severe motor disabilities face the possibility of the loss of speech. A Brain-Computer Interface (BCI) can provide a means for communication through non-muscular control. Current BCI systems use characters that flash from gray to white (GW), making adjacent character difficult to distinguish from the target. The current study implements two types of color stimulus (grey to color [GC] and color intensification [CI]) and I hypotheses that color stimuli will; (1) reduce distraction of nontargets (2) enhance target response (3) reduce eye strain. Online results (n=21) show that GC has increased information transfer rate over CI. Mean amplitude revealed that GC had earlier positive latency than GW and greater negative amplitude than CI, suggesting a faster perceptual process for GC. Offline performance of individual optimal channels revealed significant improvement over online standardized channels. Results suggest the importance of a color stimulus for enhanced response and ease of use.
Document Type
Thesis - unrestricted
Recommended Citation
Ryan, David B., "Improving Brain-Computer Interface Performance: Giving the P300 Speller Some Color." (2011). Electronic Theses and Dissertations. Paper 1328. https://dc.etsu.edu/etd/1328
Copyright
Copyright by the authors.