Table 2. The average fitness payoff for ten strategies competing in a group under the conditions that group size is 50 (n = 50), benefit equals 1 and cost equals 0.25 (b = 1 and c = 0.25).
| Strategy | Average fitness payoff | |||||
|---|---|---|---|---|---|---|
| n = 50 | e = 0.01 | e = 0.05 | e = 0.1 | e = 0.2 | e = 0.3 | e = 0.4 |
| AC (nAC = 5) | 117.404 | 110.788 | 103.612 | 90.068 | 81.006 | 72.498 |
| AD (nAD = 5) | 83.232 | 83.312 | 83.17 | 82.274 | 81.618 | 81.268 |
| AT (nAT = 5) | 97.628 | 95.851 | 93.96 | 89.362 | 84.803 | 80.479 |
| TFT (nTFT = 5) | 123.608 | 117.078 | 110.562 | 99.483 | 91.044 | 85.198 |
| GTFT (nGTFT = 5) | 118.972 | 112.194 | 105.212 | 92.772 | 82.834 | 75.121 |
| TWTH (nTWTH = 5) | 122.524 | 114.576 | 106.254 | 95.685 | 89.291 | 83.529 |
| SDH (nSDH = 5) | 123.592 | 117.873 | 111.192 | 98.136 | 86.547 | 76.087 |
| SDD (nSDD = 5) | 122.459 | 113.679 | 105.273 | 94.249 | 87.894 | 83.104 |
| GDA (nGDA = 5) | 122.813 | 115.017 | 107.288 | 97.381 | 90.564 | 85.285 |
| P (nP = 5) | 97.999 | 96.521 | 93.662 | 89.420 | 84.771 | 80.705 |
Note: Every strategy has five individual in this group, e.g. nAC = 5. The average fitness payoff in this table is based on 100 simulations. AC stands for always-cooperate. AD stands for always-defect. AT stands for always-trembling. TFT stands for tit-for-tat. GTFT stands for generous tit-for-tat. TWTH stands for TFT-with-trembling-hand. SDH stands for shame-driven-hiding. SDD stands for shame-driven-denying. GDA stands for guilt-driven-amending. P stands for Pavlov.