The purpose of the model is to explore the dynamics whether contextual spillover effect would lead to increased proportion of plant-based protein consumption from worksite to home settings, after implementing a dietary intervention aiming at increasing the consumption of plant-based protein at worksite canteen. The model includes a population of 1368 working age individual-agents with characteristics loosely based on adults participants from the Dutch National Food Consumption Survey (DNFCS) between 2012 and 2016. The output effect of the worksite canteen dietary intervention is modeled as the consumption of vegetarian meals among non-vegetarian individuals during lunch.
Depending on the effect size of the intervention at worksite during lunch time and decision-making rules based on the individual (initial dietary identity, habituation, and motivations), social (eating network), temporal (weekdays and weekends), and situational parameters (location of the dinner), the individual will choose a type of meal that corresponds to a certain level of plant-based protein. The primary outcome of the ABM would be the average percentage of plant-based protein consumed at dinner at population level. The decision-making rules at individual and interpersonal levels are based on practice theory and identity process theory as well as a handful of open access database to parameterize the model.