Figure 1. (A) Normal form representation of a Prisoner’s Dilemma. The first value in each cell represents the payoff of player 1, the second the payoff of player 2. (B) Extensive-form representation of the binary Trust Game. The first value in each payoff vector represents the payoff of the trustor, the second the payoff of the trustee.
Note. C = cooperation, D = defection. The absolute payoffs are exemplary.