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. 2015 Feb 4;9:34. doi: 10.3389/fnhum.2015.00034

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Copyright © 2015 Xu, Levy, Butman, Pham, Cohen and Sandrini.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution and 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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It shows the three experimental task conditions. Condition 1 (All-Go) had only “go” trials; Condition 2 (Stop) had 25% stop-signal trials in addition to the “go” trials; and Condition 3 (Switch) had 25% of Switch trials that required subjects to press the opposite button when a red arrow appeared. Similar to Condition 2, the remaining trials in Condition 3 were the “go” trials.