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. 2018 Jun 6;12:228. doi: 10.3389/fnhum.2018.00228

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Copyright © 2018 Halder, Takano and Kansaku.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Information transfer rates in bits/min for each system and participant. In all figures the bars were grouped according to whether they depend on vision or not [visual P300 BCI (V) with eye-tracker (E) and auditory (A) with tactile (T) P300 BCI]. The average across all participants is shown on the bottom right. Error bars over the plot of the average show the standard error. The star indicates a highly significant (p < 0.005) difference according to a paired t-test for matched samples corrected for multiple comparisons.