The final mean null strategy does not correlate with any of the other outcomes of the model (see Table 2), whereas the final mean mobility strategy does. In Fig. 3d we see that the final mean null strategy values are always around 0.5 for all simulations, consistent with its values only being shaped by its initial random assignment and random drift, and it not influencing other model outcomes. These results reassuringly indicate that mobility strategies are evolving adaptively, rather than by random cultural drift.