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Besides reducing the number of stimuli repetitions needed to detect the P300, a current challenge in P300-based BCI research is the simplification of system\u2019s setup and maintenance by lowering the number<mml:math xmlns:mml=\"http:\/\/www.w3.org\/1998\/Math\/MathML\" id=\"M1\"><mml:mrow><mml:mi>N<\/mml:mi><\/mml:mrow><\/mml:math>of recording channels. By using offline data collected in 30 subjects (21 amyotrophic lateral sclerosis patients and 9 controls) through a clinical BCI with<mml:math xmlns:mml=\"http:\/\/www.w3.org\/1998\/Math\/MathML\" id=\"M2\"><mml:mi>N<\/mml:mi><mml:mo>=<\/mml:mo><mml:mn>5<\/mml:mn><\/mml:math>channels, in the present paper we show that a preprocessing approach based on a Bayesian single-trial ERP estimation technique allows reducing<mml:math xmlns:mml=\"http:\/\/www.w3.org\/1998\/Math\/MathML\" id=\"M3\"><mml:mrow><mml:mi>N<\/mml:mi><\/mml:mrow><\/mml:math>to 1 without affecting the system\u2019s accuracy. The potentially great benefit for the practical usability of BCI devices (including patient acceptance) that would be given by the reduction of the number<mml:math xmlns:mml=\"http:\/\/www.w3.org\/1998\/Math\/MathML\" id=\"M4\"><mml:mrow><mml:mi>N<\/mml:mi><\/mml:mrow><\/mml:math>of channels encourages further development of the present study, for example, in an online setting.<\/jats:p>","DOI":"10.1155\/2014\/731046","type":"journal-article","created":{"date-parts":[[2014,7,7]],"date-time":"2014-07-07T21:06:53Z","timestamp":1404767213000},"page":"1-9","source":"Crossref","is-referenced-by-count":5,"title":["Preprocessing by a Bayesian Single-Trial Event-Related Potential Estimation Technique Allows Feasibility of an Assistive Single-Channel P300-Based Brain-Computer Interface"],"prefix":"10.1155","volume":"2014","author":[{"given":"Anahita","family":"Goljahani","sequence":"first","affiliation":[{"name":"Department of Information Engineering, University of Padova, Via Gradenigo 6\/B, 35131 Padova, Italy"}]},{"given":"Costanza","family":"D\u2019Avanzo","sequence":"additional","affiliation":[{"name":"Department of Information Engineering, University of Padova, Via Gradenigo 6\/B, 35131 Padova, Italy"}]},{"given":"Stefano","family":"Silvoni","sequence":"additional","affiliation":[{"name":"I.R.C.C.S. 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