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. 2017 Apr 10;11:176. doi: 10.3389/fnhum.2017.00176

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Copyright © 2017 Wiegand, Petersen, Finke, Bundesen, Lansner and Habekost.

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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Group mean accuracy (percentages of correctly identified target letters) for left hemifield (LHF) and right hemifield (RHF), separately for the five display conditions (1T: single-target letter, 2T ipsi: target plus second target in the ipsilateral hemifield or 2T contra: target plus second target in the contralateral hemifield, TD ipsi: target plus distractor in ipsilateral or TD contra: contralateral hemifield), for trials with (red bars) and without (gray bars) an alerting cue preceding the display.