Intrinsic motivation has been operationally defined in various ways, al- though there have been two measures that have been most often used. Basic experimental research (e.g., Deci, 1971) has rested primarily on a behavioral measure of intrinsic motivation called the ‘‘free choice’’ measure. In experiments using this measure participants are exposed to a task under varying conditions (e.g., getting a reward or not). Following this period, the experimenter tells participants they will not be asked to work with the target task any further, and they are then left alone in the experimental room with the target task as well as various distractor activities