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. 2017 Sep 18;7:11758. doi: 10.1038/s41598-017-11560-y

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© The Author(s) 2017

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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Experimental procedure of the categorisation reasoning task and behavioural performance. Top: A representative sequence and the detailed timing of one trial. Note that the illustration depicted a subordinate-basic categorisation. Moreover, ‘sparrow’ was a typical representation of ‘bird’. Bottom left: The mean RT in the conclusion items. It was notable that RT results did not reveal significant difference among the subordinate-subordinate, basic-subordinate, superordinate-subordinate, subordinate-basic, basic-basic, superordinate-basic, basic-superordinate, and subordinate-superordinate categorizations, p > 0.05 (one-way repeated-measures ANOVA). Bottom right: The accuracy of positive judgment in the conclusion items. The results revealed significant difference among the eight categorizations, p < 0.001 (one-way repeated-measures ANOVA). Note: In the bottom panel, *p < 0.05, **p < 0.01, and p < 0.001, respectively, N = 19. RT is response time; For each trial type, error bars represent ± SEM across all participants.