Emergence of Shared Intentionality Is Coupled to the Advance of Cumulative Culture
Fig 4
The dramatic switch to a high SI, high technological change, phase for sufficiently high α.
Starting with each individual equiprobably SI or N type under benchmark conditions, a: Mean and standard deviation of fraction of SI type individuals across all 64 demes and 10 replicates during generations 451 to 500, b: Average rates of technological change (steps per generation) across all 64 demes and 10 replicates over generations 451 to 500.