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. 2014 Apr 22;8:199. doi: 10.3389/fnhum.2014.00199

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Copyright © 2014 Lu, Mamun and Chau.

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) or licensor 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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Edit distances for test blocks from Sessions I (left plot), II (middle plot) and III (right plot). The horizontal line on each graph indicates an edit distance of 18 where no input was observed.