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. 2019 Feb 27;9:2940. doi: 10.1038/s41598-018-36947-3

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© The Author(s) 2019

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Cluster-based permutation tests for ERPs and amplitude difference topographies between conditions. Alerting: ERPs for the double-cued (DC) vs non-cued (NC) target stimulus (first row); orienting: ERPs for the spatially-cued (SC) vs centre-cued (CC) target stimulus (middle row); and inhibition: ERPs for the incongruent (INCON) vs congruent (CON) target stimulus (last row). Target stimulus onset is at 0 ms. Significant clusters were labelled with stars within the rectangles. ***p-values < 0.0005, **p-values between 0.005 and 0.0005. Blue and red colours indicate negative and positive amplitude values, respectively, from −4 to 4 µV.