Due to the self-licensing effect "a prior intent to be virtuous boosts respondents' self-concepts, thus reducing negative self-attributions associated with the purchase of relative luxuries". Furthermore, they predicted that consumers may be unaware of how their prior decision influences their subsequent choices; i.e. the process underlying the licensing effect may be largely nonconscious.[3] In the study, some participants were first asked to select from a list a charity organizations for which they would willingly volunteer three hours a week. Later, these people—and participants who hadn't been asked to volunteer—were asked whether they would buy designer jeans or an identically priced vacuum cleaner, assuming that they had enough money to buy only one.