Figure 2.

Average rate of occurrence (and standard error of the mean [SEM]) of each possible outcome in the Hawk–Dove game in Experiment 2: committed player plays Hawk while uncommitted player plays Dove (thick solid line), committed player plays Dove while uncommitted player plays Hawk (dotted line), both players play Hawk (thin solid line), and both players play Dove (dashed line). Results are based on five decisions with the same partner each round, with each six-person (three-pair) session treated as an N of 1 due to nonindependence of decisions. In Rounds 1–6, partners could not bid for roles (i.e., committed vs. uncommitted player), whereas in Rounds 7–12, they could bid for roles; the vertical red line separates these two kinds of rounds.