Table 1 Main symbols.
From: Reinforcement learning accounts for moody conditional cooperation behavior: experimental results
Symbol | Meaning |
|---|---|
N c | Number of peers in the current group that cooperated in the previous round in the PDG (=0, 1, 2, or 3). |
a t | Action of the focal participant in round t. In the PDG, C and D correspond to at = 1 and at = 0, respectively. In the PGG, at (0 ≤ at ≤ 1) is the normalized contribution, i.e., the amount of contribution divided by the possible maximum amount. |
K t−1 | Normalized amount of cooperation imparted by the other three members in the group in the previous round (0 ≤ Kt−1 ≤ 1). In the PDG, Kt−1 is equal to the fraction of the three members that has selected C in the previous round (i.e., Nc/3). In the PGG, Kt−1 is equal to the normalized contribution in the previous round averaged over the three members. |
p t | The propensity to cooperate in the present round. In the PDG, pt is the probability of selecting C. In the PGG, pt is the expected normalized contribution. |
