Date of Award


Document Type

Open Access

Degree Name

Bachelor of Science



First Advisor

Stephen Romero




selections, accuracy, session, online, group


Brain-computer interface (BCI) technology can provide communication for individuals suffering from degenerative neuromuscular disorders. The present study sought to demonstrate improved BCI performance in healthy individuals using confidence interval training with a P300 BCI spelling program. In this BCI interface, electroencephalographic (EEG) activity was recorded as participants attended to a specific target character within a matrix of flashing letters and numbers presented on a computer screen. The BCI uses the P300 Event Related Potential to select the intended character. In a prior patient case, use of a confidence measure that rejected questionable selections improved that user’s spelling efficiency. The present study evaluated the use of this strategy for untrained individuals. Results suggest that confidence interval training resulted in less efficient spelling across four training sessions. This work suggests that early confidence interval training may be counter-productive if used early in training. Further analysis among a larger pool of participants is needed for definitive conclusions.