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. 2024 Jul 22;14:16769. doi: 10.1038/s41598-024-66499-8

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© The Author(s) 2024

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 licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence 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 licence, visit http://creativecommons.org/licenses/by/4.0/.

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Flow Chart of Experimental Procedure. Participants start by seeing the balance screen ("U heeft"—You have, "De ander heeft"—The other has). Then they perform either a free ("Kies") or forced ("Gedwongen") choice. In free choice trials, they select to take ("X") or not take ("M") money. In forced choice trials, they hear either "Pak het geld!" (Take the money!) or "Pak niet het geld!" (Do not take the money!), and only the associated key ("X" or "M") works. After a blank screen (200, 500, or 800 ms delay), they hear the tone indicating the outcome. After a short blank screen, they report the perceived time interval ("Schatting tijd") between their button press and the tone.