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. Author manuscript; available in PMC: 2016 Jul 1.
Published in final edited form as: Behav Processes. 2015 Apr 20;116:12–16. doi: 10.1016/j.beproc.2015.04.009

Figure 1.

Figure 1

Payoff matrices for the Partner-Reward groups. The two payoff schedules were presented in the form of matrices where the green (or light gray) blocks represent cooperation and the blue (or black) blocks represent defection. The 1-2-3-4 and 1-2-9-10 reward matrices for the Partner-reward group are shown, where the large font is the reward to self and the small font is the reward to other player. The No-Partner-Reward group saw a similar matrix, but the spaces for other player's outcome (small font) were left blank.