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. 2021 Apr 28;11:9138. doi: 10.1038/s41598-021-88357-7

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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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Experimental design. Animals were exposed to three different trials: sample 1, sample 2 and test; each lasting 15 min and with 1-week inter-trial interval. Two distinct sets of identical objects were presented for sample 1 and sample 2, counterbalanced across marmosets. For the test, the same objects were presented but two of them were displaced to a new position.