Fig 1.
The experimental environment: Triangles represent the agents spread at different locations of the environment; different agent colors express different followed strategies.
Fig 2.
The adopted payoff matrix.
Fig 3.
Typical patterns—“islands”—of cooperation emerging from the experiments.
Fig 4.
Typical evolution in time of the cumulative payoff for agents playing different strategies.
Fig 5.
Average cumulative payoff, depending on the number of stigmergic agents (all other agents have a population of 200 each).
Fig 6.
Average cumulative payoff, depending on the number of stigmergic agents, and without defector agents (all other agents have a population of 200 each).
Fig 7.
Effect of pheromone evaporation rate on the payoff of stigmergic agents.
Fig 8.
Effect of pheromone diffusion rate on the payoff of stigmergic agents.