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. 2017 Mar 24;20(4):581–589. doi: 10.1007/s10071-017-1082-x

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© The Author(s) 2017

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided 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.

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Fig. 3 — Average percentage of choice responses made to the Knower in each trial of the three tests (GP, GA and GLA) and lines fitted to the data using Prism’s linear regression analysis. The dashed lines show the 95% confidence interval