Improving Brain-Computer Interface Performance: Giving the P300 Speller Some Color.

<p>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.</p>

Name thesis:degree_name

MA (Master of Arts)

Level thesis:degree_level

Thesis - unrestricted

Discipline thesis:degree_discipline

Psychology

Year dc:date.issued

2011

Author dc:creator

• Ryan, David B.

• Assistive Devices
• Brain-Computer Interface
• EEG
• P300 Event-Related Potential
• Color
• Computer Sciences
• Graphics and Human Computer Interfaces
• Physical Sciences and Mathematics

Statement dc:rights

• Copyright by the authors.

Repository record dc:identifier

https://dc.etsu.edu/etd/1328

OAI identifier oai:identifier

oai:dc.etsu.edu:etd-2519