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. 2009 Apr 15;4(4):e5192. doi: 10.1371/journal.pone.0005192

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Tanaka 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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The cultural fitness (a–c) and probability of spread (d–f) of self-medicative treatments, plotted as a function of treatment efficacy, , when there is a single episode of illness and demonstration occurs only during illness. Left (a and d), effect of varying maximum rate of abandonment, . Middle (b and e), effect of varying rate of recovery, . Right (c and f), effect of varying rate of decay in treatment abandonment. Unless otherwise stated , , , , , , , and (see also Methods and Table 1).

Inline graphic — The cultural fitness (a–c) and probability of spread (d–f) of self-medicative treatments, plotted as a function of treatment efficacy, , when there is a single episode of illness and demonstration occurs only during illness. Left (a and d), effect of varying maximum rate of abandonment, . Middle (b and e), effect of varying rate of recovery, . Right (c and f), effect of varying rate of decay in treatment abandonment. Unless otherwise stated , , , , , , , and (see also Methods and Table 1).