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. 2016 Dec 9;7:1927. doi: 10.3389/fpsyg.2016.01927

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Copyright © 2016 Schmitt, Ankeny, Sweeney and Mosconi.

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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Sequence of stimulus presentation during the oculomotor and manual motor Stop Signal tests. Following fixation, “GO” and “STOP” trials were pseudorandomly presented. During GO trials, subjects responded to a peripheral target appearing in either the right or left hemifield by looking toward the target (oculomotor) or pressing the corresponding button (manual motor). During STOP trials, a central STOP cue was presented at a variable delay following the onset of the GO cue. Participants were instructed to inhibit their response when the STOP cue appeared. GO trials constituted approximately 60% of task trials, but every third incorrect GO trial was repeated in order to encourage participants to respond throughout the task.