Single-trial classification of P300 speller data
نویسندگان
چکیده
منابع مشابه
PolyMorph: A P300 Polymorphic Speller
P300 is an electric signal emitted by brain about 300 milliseconds after a rare, but relevant-for-the-user event. Even if it is hard to identify and it provides a low-rate communication channel, it raises the interest of the scientific community because it can be used in cases in which other evoked potentials fail. One of the applications of this signal is a speller that enables subjects who lo...
متن کاملIs the P300 Speller Independent?
The P300 speller is being considered as an independent brain–computer interface. That means it measures the user’s intent, and does not require the user to move any muscles. In particular it should not require eye fixation of the desired character. However, it has been shown that posterior electrodes provide significant discriminative information, which is likely related to visual processing. T...
متن کاملToward enhanced P300 speller performance.
This study examines the effects of expanding the classical P300 feature space on the classification performance of data collected from a P300 speller paradigm [Farwell LA, Donchin E. Talking off the top of your head: toward a mental prosthesis utilizing event-related brain potentials. Electroenceph Clin Neurophysiol 1988;70:510-23]. Using stepwise linear discriminant analysis (SWLDA) to constru...
متن کاملEnsemble SWLDA Classifiers for the P300 Speller
The P300 Speller has proven to be an effective paradigm for braincomputer interface (BCI) communication. Using this paradigm, studies have shown that a simple linear classifier can perform as well as more complex nonlinear classifiers. Several studies have examined methods such as Fisher’s Linear Discriminant (FLD), Stepwise Linear Discriminant Analysis (SWLDA), and Support Vector Machines (SVM...
متن کاملNew Methods for the P300 Visual Speller
Brain-Computer Interfaces (BCI ’s) enable us to infer intentional control signals from brain activity. The Visual Speller is a BCI based on event related potentials (ERP ’s) in the electroencephalogram, such as the P300 (a positive deflection in the EEG about 300 ms after a rarely occuring stimulus). In the classical paradigm one trial (i.e. prediction of one symbol) consists of successive high...
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ژورنال
عنوان ژورنال: Frontiers in Computational Neuroscience
سال: 2010
ISSN: 1662-5188
DOI: 10.3389/conf.fncom.2010.51.00131