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. 2020 Jul 1;10:10713. doi: 10.1038/s41598-020-67721-z

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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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Trial classification. “Message” refers to the information sent to the opponent by the first button press: “Red/Blue option is more profitable to You”. “Question” refers to the answer to the second question: “Which state do you expect the receiver to choose? The red column or the blue column?”.