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Full-Text Articles in Physical Sciences and Mathematics
Improving Brain-Computer Interface Performance: Giving The P300 Speller Some Color., David B. Ryan
Improving Brain-Computer Interface Performance: Giving The P300 Speller Some Color., David B. Ryan
Electronic Theses and Dissertations
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 …
A Case Study Of The Effects Of A Web Interface Redesign Based On Usability Guidelines., Paromita Bhattacharya
A Case Study Of The Effects Of A Web Interface Redesign Based On Usability Guidelines., Paromita Bhattacharya
Electronic Theses and Dissertations
Usability guidelines for user interface (UI) design formulated by Nielsen and other authorities were used to redesign the web interface for a web based distance education course. The website's original UI, as judged by a group of web design professionals, violated standard guidelines for usability, readability, learnability, consistency, efficiency of use and flexibility. The original and redesigned UIs were tested using thinking aloud testing, a user satisfaction survey, and usability inspection. The results of user testing and heuristic evaluation suggest that the use of these guidelines in website redesign had a positive impact on user performance. A more conclusive result …