Psychology says people who waste a lot of food in marriage functions aren't necessarily unaware of the value of food. Their behaviour can be shaped by the setting in which they eat. Marriage functions often involve buffets, many dishes, large portions and a large number of guests. These conditions can make people take more food than they can finish. Social expectations can also influence decisions. A person may see other guests taking large portions and follow the same pattern. Research on food waste has examined social norms, buffet behaviour and portion choices. Studies also suggest that changes in the way food is presented can reduce waste.
