Fig. 1.

Diagram of steps for diet selection by agents. Following initialisation during which agents are assigned constant values for their meal-to-meal variability and the weight for modelling group choices, each meal agents each make an unconstrained internal preference from a random normal distribution centred on their previous choice. In the household network (breakfast and dinner) the family choice was the mean of the agents’ internal preferences. For lunches, the personal norm was combined with the group norm. The meal chosen by each agent was the item from the daily menu that most closely matched the final preference