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. 2021 Sep 17;4:1100. doi: 10.1038/s42003-021-02608-x

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

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Fig. 1 — The experiment begins with a blank screen viewing condition in which participants were asked to look at a grey screen for 30 s. Next, participants were presented with a set of static images representing a variety of different scenes (e.g., indoor, outdoor scenes with or without humans or natural vs. man-made). Subjects were asked to explore with their eyes the picture and press a bar when ready to explore the next picture. They were also told that they will be asked some questions at the end of the experiment.