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. 2021 May 6;11:9663. doi: 10.1038/s41598-021-88431-0

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© The Author(s) 2021

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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Paradoxical role of intensity. (a,b) Show positive relation of expressed and perceived intensity in Experiment 1(a) and 2 (b). Stimuli (dots) are grouped by expressed valence, emotion and intensity. (c,d) Show emotion classification accuracy as a function of valence, emotion, and intensity in Experiment 1(c) and 2(d). Violin plots represent the effect of intensity on correct emotion classification, box plots represent the interaction of valence and intensity, and lines represent the interaction of emotion and intensity on correct emotion classification. Error bars indicate 95% confidence intervals. n.s. = non-significant. *p < 0.05. **p < 0.01. ***p < 0.001. Figure created with R version 4.0.3³⁵.