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. 2021 Aug 2;238(11):3119–3130. doi: 10.1007/s00213-021-05929-1

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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. 2 — Social play behaviour for all individual rats. A and B The number of pounces (grey) and pins (in black) for all individual animals in batch 1 and 2, respectively (N = 48 per batch); LP, low players; MP, medium players; HP, high players. C The distribution of the rats that were excluded because they could not with certainty be classified as LP, MP or HP. D The average number of pounces and pins performed and the number of occasions the animals were being pounced or pinned are shown for the groups of selected LP (N = 16) and HP (N = 29). E The average time spent on social or non-social exploration for the selected groups of LP (N = 16) and HP (N = 29). Data are shown as average + SEM by play subgroup. ***Significant from low playing rats (p < 0.001)