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. 2014 May 5;9(5):e95742. doi: 10.1371/journal.pone.0095742

Table 1. Cooperative strategies: average survival time in 100 evolutionary games (for details of strategies see S 2: IPD strategies employed).

Strategy Without weapon use (generations) (p = 0.00) With weapon use (generations) (p = 0.05) Change (generations)
AllC 24.26 47.72 23.46
TFT 44.56 48.46 3.90
GRIM 36.84 35.29 −1.55
TFTT 41.44 51.05 9.61
Pavlov 28.75 32.96 4.21
GTFT 41.01 52.66 11.65
HTFT 33.76 35.61 1.85
SM 41.62 47.51 5.89
TTFT 36.62 36.54 −0.08
CTFT 45.65 47.05 1.40
ATFT 42.72 45.72 3.00
SGRIM 38.96 49.53 10.57
FBF 40.84 44.74 3.90
Gradual 36.36 36.94 0.58
Total 500.03 577.84 78.39

Note: Average change in performance for all strategies is 78.39/14 = 5.6 generations. Average change in performance of all strategies other than ‘Always Cooperate’ is 54.93/13 = 4.2 generations.