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. 2016 May 5;371(1693):20150370. doi: 10.1098/rstb.2015.0370

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© 2016 The Authors.

Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited.

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Figure 4. — Infant call acoustics change after adult vocalizations. (a) Exemplar probability density distribution of entropy and duration for P3, P12 and P24 for a single marmoset. Warmer colours indicate higher probability density values. (b) Weighted average entropy of infant calls produced before adult call onset (yellow line) and after adult call offset (green line). The shaded regions indicate the respective 95% confidence intervals. (c) Index of entropy change (black line) ([entropy after − entropy before]/[entropy after + entropy before]). (d) Weighted average duration of infant calls produced before adult call onset (yellow line) and after adult call offset (green line). The shaded regions indicate the respective 95% confidence intervals. (e) Index of duration change (black line) ([duration after − duration before]/[duration after + duration before]).