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 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 lost the control of their motor pathways to communicate by selecting one by one each character of a sentence in a matrix containing all the alphabet symbols. This paper provides an improvement of this paradigm and it aims at reducing both the error rate and the time required to spell a sentence by exploiting the redundancy which is present in all the natural languages.

PolyMorph: A P300 Polymorphic Speller

CASAGRANDE, ALBERTO;JARMOLOWSKA, JOANNA;TURCONI, MARCELLO MARIA;FABRIS, FRANCESCO;BATTAGLINI, PIERO PAOLO
2013-01-01

Abstract

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 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 lost the control of their motor pathways to communicate by selecting one by one each character of a sentence in a matrix containing all the alphabet symbols. This paper provides an improvement of this paradigm and it aims at reducing both the error rate and the time required to spell a sentence by exploiting the redundancy which is present in all the natural languages.
978-3-319-02753-1
978-3-319-02752-4
http://dx.doi.org/10.1007/978-3-319-02753-1_30
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11368/2723686
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