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. 2010 Aug 6;35(8):727–734. doi: 10.1093/chemse/bjq076

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© The Author 2010. Published by Oxford University Press.

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/2.5), which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Determination of ethanol detection threshold for 4 minipigs. Each data point represents mean percentage correct choices from 5 to 8 blocks of 20 trials comprising a total of 100-160 decisions. In case of more than one replicate at one concentration, a line is drawn at the mean value. Horizontal reference line (y = 50) denotes chance level. To master the task, individuals should reach a mean of minimum 75% correct responses in one 100- to 160-trial session. Failure in reaching success criterion is denoted by a blank circle.