Figure 3.
Joint evolution of cooperation and cognition in individual-based simulations. We compare the stability of cooperation (a) and cognition (b), with and without cognition. In both panels, the blue (grey) line represents the same simulation run with (without) cognition. In the run with cognition, the synergy factor α = 0.4. Relatedness was decreased halfway through each run (i.e. k = 10 and k = 100 in the first and second half, respectively, with Ro = 1/k). Parameters: n = 15, c = 1, b = 7, d = 0.5, bC = 3.5, μh = μc = 0.01 and σ = 0.01.