Anthony is studying for his final exam the next day, but a friend calls and invites him to a party. anthony really wants to go to the party, but he also needs a good grade on his final in order to maintain his standing on the dean's honor roll and increase his chances of getting into medical school. instead of thinking about how much fun the party will be, anthony instead visualizes himself as a doctor, treating patients and performing surgery. what self-control strategy is anthony using?