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. 2014 Jan 24;5:12. doi: 10.3389/fpsyg.2014.00012

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Copyright © 2014 Sezille, Fournel, Rouby, Rinck and Bensafi.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Pilot study. (A) The tested odorants cover a large range of pleasantness ratings. (B) Odorant molecules covered a full range of structural complexity (complexity index was collected from PubChem, one of the largest databases of chemical molecules – http://pubchem.ncbi.nlm.nih.gov/; see also Kermen et al., 2011 for details), of molecular weight and of physicochemical properties (molecular composite index based on a principal component analysis with physicochemical data obtained from Dragon^® software).