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. 2020 Feb 13;10:2608. doi: 10.1038/s41598-020-59415-3

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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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Schematic representation of the experimental task: (a) Trial scheme of the incentivized dot comparison task depicting the three phases (i.e., incentive cue, stimulus, feedback) of a correctly answered trial for both the reward (top) and the control (bottom) condition; (b) Scoring scheme shown after each block giving an overview about the points the participant collected in reward trials during the last block (white number) and the accumulated total points (red number and white bar) as well as the obtained bonus winning level (levels 1–15) and the corresponding items (pencil or vouchers; right panel) the participant had already won (see Methods section for more details about the task).