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. 2021 Jul 6;11:13868. doi: 10.1038/s41598-021-93412-4

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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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Dilemma-specific differences in cognitive processes. (a) Percentage of people who correctly answered the two questions on understanding about the self-gain maximization strategy and the group-gain maximization strategy. (b) Perceptions of social appropriateness of three decision scenarios: contributions of 0, 5 and 10 (or withdrawals or 10, 5 and 0), corresponding to “zero-contribution”, “half-contribution” and “maximal-contribution” (only elicited in Study 1). c, Number of correct answers on the Cognitive Reflection Test (only elicited in Study 2). Error bars show 95% confidence intervals. See "Methods" for detailed definition of measures and Supplementary Materials for additional analyses.