Fig 3. The average fitness payoff for five homogeneous groups which adopt the error-prone strategies at four different error rates.

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. (A) When b = 1, c = 0.25 and n = 10. (B) When b = 1, c = 0.25 and n = 20. (C) When b = 1, c = 0.25 and n = 50. (D) When b = 1, c = 0.25 and n = 100.