title: Toward development of a two-state brain-computer interface based on mental tasks.
abstract: A recently collected EEG dataset is analyzed and processed in order to evaluate the performance of a previously designed brain-computer interface (BCI) system. The EEG signals are collected from 29 channels distributed over the scalp. Four subjects completed three sessions each by performing four different mental tasks during each session. The BCI is designed in such a way that only one of the mental tasks can activate it. One important advantage of this BCI is its simplicity, since autoregressive modeling and quadratic discriminant analysis are used for feature extraction and classification, respectively. The autoregressive order which yields the best overall performance is obtained during a fivefold nested cross-validation process. The results are promising as the false positive rates are zero while the true positive rates are sufficiently high (67.26% average).
authors.affiliation: Electrical and Computer Engineering Department, University of British Columbia, Vancouver, BC V6T1Z4, Canada. farhadf@ece.ubc.ca
authors.forename: Farhad
authors.initials: F
authors.lastname: Faradji
authors.forename: Rabab K
authors.initials: RK
authors.lastname: Ward
authors.forename: Gary E
authors.initials: GE
authors.lastname: Birch
mesh_terms: D000328:Adult; D000465:Algorithms; D016002:Discriminant Analysis; D004569:Electroencephalography; D005188:False Negative Reactions; D005189:False Positive Reactions; D006801:Humans; D007092:Imagination / Q000502:physiology; D008297:Male; D008433:Mathematics; D008606:Mental Processes / Q000502:physiology*; D008959:Models, Neurological; D015233:Models, Statistical; D011474:Prosthesis Design; D012044:Regression Analysis; D015203:Reproducibility of Results; D014584:User-Computer Interface; D055815:Young Adult