PolyMorph: A P300 Polymorphic Speller
نویسندگان
چکیده
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 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, in particular, it aims at reducing both the error rate and the time required to spell the entire sentence by exploiting the redundancy which is present in all the natural languages.
منابع مشابه
PolyMorph: Increasing P300 Spelling Efficiency by Selection Matrix Polymorphism and Sentence-Based Predictions
P300 is an electric signal emitted by brain about 300 milliseconds after a rare, but relevant-for-the-user event. One of the applications of this signal is sentence spelling that enables subjects who lost the control of their motor pathways to communicate by selecting characters in a matrix containing all the alphabet symbols. Although this technology has made considerable progress in the last ...
متن کاملسنجش عملکرد سامانه‌های رابط مغز و رایانه P300 Speller به‌ازای ماتریس نمایش ردیف و یا ستون (RCP) و نمایش حروف زبان فارسی
As a Brain computer interface system, BCI P300 Speller tries to help disabled people and patients to regain some of their lost ability with allowing communication via typing. The ability of personalization is one of the most important features in a BCI system, so the typing language as a personalization factor is an important feature in a BCI speller. Most prior researches on P300 Speller has f...
متن کاملUse of a Green Familiar Faces Paradigm Improves P300-Speller Brain-Computer Interface Performance
BACKGROUND A recent study showed improved performance of the P300-speller when the flashing row or column was overlaid with translucent pictures of familiar faces (FF spelling paradigm). However, the performance of the P300-speller is not yet satisfactory due to its low classification accuracy and information transfer rate. OBJECTIVE To investigate whether P300-speller performance is further ...
متن کاملGeoSpell: an alternative P300-based speller interface towards no eye gaze required
The speller based on the N by N matrix is the most commonly used approach for text writing in a P300-based Brain Computer Interface. This study presents an alternative P300 speller interface, GeoSpell (Geometric Speller), where stimuli are delivered in a covert attention modality and thus not require eye gaze control. Moreover, the GeoSpell interface allows to avoid the problem of the adjacent ...
متن کاملA covert attention P300-based brain-computer interface: Geospell.
UNLABELLED The Farwell and Donchin P300 speller interface is one of the most widely used brain-computer interface (BCI) paradigms for writing text. Recent studies have shown that the recognition accuracy of the P300 speller decreases significantly when eye movement is impaired. This report introduces the GeoSpell interface (Geometric Speller), which implements a stimulation framework for a P300...
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تاریخ انتشار 2013