Evaluating Brain-Computer Interface Performance Using Color in the P300 Checkerboard Speller

A Brain Computer Interface (BCI) is a specific type of human-machine interaction. BCI is a direct link between the human brain and a computer. BCIs can be defined as invasive utilizing techniques requiring implantation such as electrocorticography (ECoG), or non-invasive techniques utilizing techniques requiring surface electrodes such as electroencephalography (EEG [Wolpaw et al. 2003]). A BCI can provide an important communication outlet for those who are "locked-in" by amyotrophic lateral sclerosis (ALS), brain stem stroke, or head trauma.

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