On method: Modifying Schwartz´theory of basic human values
One of the many types of factors that can predict cooperative behaviour is people’s “values”. Studies of how values affect behaviour are often based on Shalom Schwartz’ Theory of Basic Human Values, and the Schwartz Value Survey (SVS) or the Portrait Values Questionnaire (PVQ) are often used to measure people’s “value orientations”. By using this approach, it has e.g. been shown that those who are high in “benevolence” and “universalism” are most willing to cooperate, whereas those who regard power, achievement and pleasure as most important in life are less cooperative. However, categories like “benevolence” and “universalism” are quite broad, and there are e.g. huge differences between the views that are labelled as universalist.