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. 2023 Nov 7;10:773. doi: 10.1038/s41597-023-02693-z

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© The Author(s) 2023

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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Fig. 1 — Stimuli and task. (a) Sample stimuli of one female identity ranging from 0% fear/100% happy to 100% fear/0% happy. (b) Task. A face was presented for 1 s followed by a question asking participants to identify the facial emotion (fearful or happy). After a blank screen of 500 ms, participants were then asked to indicate their confidence in their decision (‘1’ for ‘very sure’, ‘2’ for ‘sure’, or ‘3’ for ‘unsure’). Faces are not shown to scale.