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. 2015 Nov 24;6:1776. doi: 10.3389/fpsyg.2015.01776

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Copyright © 2015 Ferdenzi, Fournel, Thévenet, Coppin 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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Sniff characteristics (A: volume, B: duration, and C: maximum flow rate) as a function of odor pleasantness for 20 odorants in Experiment 3 (young adults: left column) and Experiment 4 (elderly adults: right column). Linear and quadratic relationships are represented by trend curves, R² and level of significance (^***p < 0.001; ^**p < 0.01; ^*p < 0.05; ns: non-significant or p > 0.05; linear: dashed line and regular font; quadratic: continuous line and bold font).