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. 2021 Apr 9;53(6):2351–2371. doi: 10.3758/s13428-021-01552-2

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© The Author(s) 2021

Open AccessThis 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. 7 — Residuals vs Predictions for the World Happiness data set for the model without (left panel) and with (right panel) the interaction effect of Life expectancy and Social support. The red line is a smoothed estimate of the mean at each point and is ideally completely flat. Figures from JASP