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. Author manuscript; available in PMC: 2021 Nov 1.
Published in final edited form as: Psychoneuroendocrinology. 2020 Aug 2;121:104803. doi: 10.1016/j.psyneuen.2020.104803

Figure 3:

Figure 3:

A. Trial outcomes (reward, R; temptation, T; sucker, S; punishment, P) in 24 trials/day (mean±SEM) from rats playing iterated Prisoner’s Dilemma (IPD) or Stag hunt (SH) with a Stooge who follows a random response strategy (IPD-Random, closed bars), Win-stay/Lose-shift (IPD-WSLS, gray bars), or Tit-for-tat (IPD-TFT, open bars; SH-TFT, striped bars). See Figure 1 for experimental details. B. Transition vectors, reflecting the probability of cooperation when the previous trial resulted in outcomes of R, T, S or P, respectively. Asterisk indicates significant effect of trial outcome.