First, Regan manipulated the degree to which a participant liked Joe, by having the subject overhear Joe being either polite or rude to a person during a phone conversation. In one condition, Joe would leave and bring back two soft drinks, giving one as a gift to the participant. In another condition, Joe would leave and return empty handed. After evaluating some art, Joe was then left alone with the participant at which point he would hand them a note, asking them to buy some raffle tickets.