Perceptual errors in the Farwell and Donchin matrix speller

Perceptual errors such as repetition blindness (RB) and attentional blink (AB) can affect the morphology of the target-P300. These perceptual errors may occur with the use of the Farwell & Donchin P300 speller protocol and in turn interfere with the desired symbol identification. In this paper a state of the art classification algorithm is employed to classify brain-computer interface (BCI) competition II and III P300 data and its performance used to assess the presence and effect of such phenomena. The general trend of the results indicated that perceptual errors were present and their effect on classification performance was detrimental. Although the degree to which these perceptual errors affected classification performance varied across subjects.