Figure 2: Fraction of cooperation in the PDG as a function of the number of the other group members that cooperated in the previous round, Nc.
From: Reinforcement learning accounts for moody conditional cooperation behavior: experimental results
(a) Fixed treatment. (b) Mixed treatment. The circles represent the fraction of cooperators not conditioned on the action of the focal participant in round t−1, at−1. The triangles and squares represent the fraction of cooperators conditioned on at−1 = C and at−1 = D, respectively. The error bars represent the 95% confidence intervals. The solid curves represent fitting of the CC model. The dashed and dotted curves represent the probability of C conditioned on at−1 = C and at−1 = D, respectively, fitted by the MCC model.
