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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
Boxplots of 15 subjects’ averaged FRR for 5-fold cross-validation for left performed motor, right performed motor, combined performed motor, left imagined motor, right imagined motor, combined imagined motor, and combined tasks.