Figure 4

Demonstrators subgroup. Individuals choose a random member of a fixed group of size Dm and copy that individual’s behavioural variant. For all simulations, Dm = 5. (A) Initial frequency of variant A is fixed at 50% for all runs, replicating the results of Acerbi et al.¹⁶. (B) The sigmoidal curve remains apparent when initial frequency of variant A is varied across runs from 0% to 100% in increments of 0.1%. (C) When variant A is always rare initially, the sigmoidal curve largely disappears, replaced with an r-shaped curve.