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. 2016 Feb 5;371(1687):20150100. doi: 10.1098/rstb.2015.0100

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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. — For the public goods (PG) rounds (circles) and indirect reciprocity (IR) rounds (squares), the group mean ‘yes’ per round for both treatments are shown. In treatment 1 (black), the groups played PG rounds, from round 11 to round 20 with their transferable name (T) (filled symbols) and from round 21 to 25 with their non-transferable name (NT) (open symbols). In treatment 2 (grey), the groups played PG rounds, from round 11 to round 20 with their non-transferable name and from round 21 to 25 with their transferable name. The period from round 1 to 10 was identical in both treatments (three PG rounds played with the non-transferable name, two IR rounds with the transferable name, three PG rounds with the transferable name and two IR rounds with the transferable name) (adapted from [39]).