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. 2014 Sep 24;9(9):e108176. doi: 10.1371/journal.pone.0108176

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© 2014 Pitteri et al

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.

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Mean ± SD number of owner's face choices done by expert and naïve dogs with each type of manipulation in test trials of Experiment 2. Error bars represent the standard deviation from mean.