Emergence of Shared Intentionality Is Coupled to the Advance of Cumulative Culture
Fig 2
The effect of shared intentionality on technology dynamics.
Blue-colored vertices represent individuals playing ‘new’, white vertices represent individuals playing ‘old’. Individuals not shown are assumed to be playing ‘old’. a: In the absence of SI, the only better response for any individual is to retain his current strategy. b: For low α, coalitions of SI type individuals can coordinate payoff improving switches back to ‘old’. c: For high α, coalitions of SI type individuals can coordinate payoff improving switches to ‘new’ [14]. Note that threshold values of α depend on graph structure and that different interaction structures can yield different thresholds [14, 46]. For an example with explicitly calculated thresholds, see Section S2.2.