Journal
JOURNAL OF NEURAL ENGINEERING
Volume 6, Issue 2, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1741-2560/6/2/026003
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We reveal the presence of refractory and overlap effects in the event-related potentials in visual P300 speller datasets, and we show their negative impact on the performance of the system. This finding has important implications for how to encode the letters that call be selected for communication. However, we show that such effects are dependent on stimulus parameters: an alternative stimulus type based on apparent motion suffers less from the refractory effects and leads to an improved letter prediction performance.
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