|Title||EEG-based communication: presence of an error potential. |
|Publication Type||Journal Article |
|Year of Publication||2000 |
|Authors||Schalk, G, Wolpaw, JR, McFarland, DJ, Pfurtscheller, G |
|Journal||Clin Neurophysiol |
|Date Published||12/2000 |
|Keywords||Adult, Brain, Brain Mapping, Electroencephalography, Evoked Potentials, Female, Humans, Male, Middle Aged, Research Design |
|Abstract|| BACKGROUND: EEG-based communication could be a valuable new augmentative communication technology for those with severe motor disabilities. Like all communication methods, it faces the problem of errors in transmission. In the Wadsworth EEG-based brain-computer interface (BCI) system, subjects learn to use mu or beta rhythm amplitude to move a cursor to targets on a computer screen. While cursor movement is highly accurate in trained subjects, it is not perfect.
METHODS: In an effort to develop a method for detecting errors, this study compared the EEG immediately after correct target selection to that after incorrect selection.
RESULTS: The data showed that a mistake is followed by a positive potential centered at the vertex that peaks about 180 ms after the incorrect selection.
CONCLUSION: The results suggest that this error potential might provide a method for detecting and voiding errors that requires no additional time and could thereby improve the speed and accuracy of EEG-based communication.
|Alternate Journal||Clin Neurophysiol |
|PubMed ID||11090763 |