Logistic fits for a forager’s probability to exit () as a function of her crop load and the colony state.
A two-dimensional logistic function of the form was fit to each estimated probability to exit from Figure 6a–c. The effect of each factor is reflected in its fitted coefficient. Within each model, effects can be compared to one another because the values of and lay on the same scale between 0 and 1. In the constant decision rate model, all coefficients were comparable in value, indicating that and had similar meaningful effects on the probability to exit. In the model where decision rate was matched to interaction rate, the effect of was weaker than the effect of , but both were still meaningful. In the model where decision rate was matched to unloading rate, the effect of approached 0 and was very weak compared to the effect of .