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. Author manuscript; available in PMC: 2016 Jul 1.
Published in final edited form as: Behav Processes. 2015 Apr 20;116:12–16. doi: 10.1016/j.beproc.2015.04.009

Figure 3.

Figure 3

Distribution of cumulative cooperations for each participant by group. The x-axis is the sum of cooperation responses across conditions (out of 80), and the y-value is the number of participants who cooperated that amount.