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Features are computed in different time segments using three widely used methods for motor imagery tasks and, then, they are concatenated or averaged in order to take into account the time course variability of the EEG signals. Once EEG features have been extracted, proposed framework comprises two stages. The first stage entails feature ranking and, in this work, two different procedures have been considered, the least angle regression (LARS) and the Wilcoxon rank sum test, to compare the performance of each one. The second stage selects the most relevant features using an efficient leave-one-out (LOO) estimation based on the Allen's PRESS statistic. Experimental comparisons with the state-of-the-art BCI methods shows that this approach gives better results than current state-of-the-art approaches in terms of recognition rates and computational requirements and, also with respect to the first ranking stage, it is confirmed that the LARS algorithm provides better results than the Wilcoxon rank sum test for these experiments.<\/jats:p>","DOI":"10.1142\/s0129065713500159","type":"journal-article","created":{"date-parts":[[2013,3,26]],"date-time":"2013-03-26T09:26:07Z","timestamp":1364289967000},"page":"1350015","source":"Crossref","is-referenced-by-count":46,"title":["EFFICIENT AUTOMATIC SELECTION AND COMBINATION OF EEG FEATURES IN LEAST SQUARES CLASSIFIERS FOR MOTOR IMAGERY BRAIN\u2013COMPUTER INTERFACES"],"prefix":"10.1142","volume":"23","author":[{"given":"GERMAN","family":"RODR\u00cdGUEZ-BERM\u00daDEZ","sequence":"first","affiliation":[{"name":"Centro Universitario de la Defensa de San Javier, (University Centre of Defence at the Spanish Air Force Academy), MDE-UPCT, Santiago de la Ribera, Murcia 30720, Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"PEDRO J.","family":"GARC\u00cdA-LAENCINA","sequence":"additional","affiliation":[{"name":"Centro Universitario de la Defensa de San Javier, (University Centre of Defence at the Spanish Air Force Academy), MDE-UPCT, Santiago de la Ribera, Murcia 30720, Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"JOAQU\u00cdN","family":"ROCA-DORDA","sequence":"additional","affiliation":[{"name":"Centro Universitario de la Defensa de San Javier, (University Centre of Defence at the Spanish Air Force Academy), MDE-UPCT, Santiago de la Ribera, Murcia 30720, Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"219","published-online":{"date-parts":[[2013,6,9]]},"reference":[{"key":"rf1","doi-asserted-by":"publisher","DOI":"10.1007\/s00702-010-0450-3"},{"key":"rf2","doi-asserted-by":"publisher","DOI":"10.1016\/j.neuroimage.2011.04.070"},{"key":"rf3","doi-asserted-by":"publisher","DOI":"10.1016\/j.ijpsycho.2012.05.001"},{"key":"rf4","doi-asserted-by":"publisher","DOI":"10.1142\/S0129065712500025"},{"key":"rf5","doi-asserted-by":"publisher","DOI":"10.1016\/j.jneumeth.2012.08.020"},{"key":"rf6","doi-asserted-by":"publisher","DOI":"10.1201\/9781439815328"},{"key":"rf7","author":"Ahmadlou M.","journal-title":"Clin. 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