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. 2020 Mar 24;10:5344. doi: 10.1038/s41598-020-62180-y

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© The Author(s) 2020

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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Hypotheses for interaction between competing SSVEP tags. Mean SSVEP amplitude response over LFP electrodes from both monkeys as a function of TF (a), averaged over 25% contrast grating conditions from Experiments 1 and 2. Error bars denote ±1 SEM and are smaller than the marker size when not visible. Smooth gray curve indicates the difference of exponentials fit to the mean response. Arrows and thick horizontal bars indicate, respectively, the target frequencies and the corresponding mask frequencies used in Experiment 2. Panels below depict hypothetical target frequency SSVEP amplitude responses for no TF suppression (b), non-specific suppression (c), SSVEP gain-specific suppression (d) and low-frequency suppression (e).