Figure 3: Contribution in the PGG as a function of the average normalized contribution by the other group members in the previous round, Kt−1.
From: Reinforcement learning accounts for moody conditional cooperation behavior: experimental results
(a) Fixed treatment. (b) Mixed treatment. Due to the continuous nature of Kt−1, we categorized the decisions into four bands according to the value of Kt−1 and then calculated the statistics for the data in each band. Error bars represent the 95% confidential intervals. The circles represent the participant’s normalized contribution, at, not conditioned on the same participant’s contribution in the previous round, at−1. The triangles and squares represent at of high (at−1 > 0.5) and low (at−1 ≤ 0.5) contributors in the previous round, respectively.
