Sandbagging is a self-presentational strategy involving the false prediction or feigned demonstration of inability. Three studies explored the individual differences and situational variables influencing sandbagging behavior. Study 1 demonstrated that the newly created Sandbagging Scale possessed adequate reliability, convergent validity, and discriminant validity. The next two studies examined the social determinants of sandbagging. In Study 2, greater performance pressure led participants with higher scores on the Sandbagging Scale to predict worse performance on an upcoming task. In Study 3, participants with higher scores on the Sandbagging Scale were more likely to predict worse performance on an upcoming task to someone who was ostensibly evaluating their performance, but only when the individual did not possess prior performance information. Sandbagging is discussed as a self-presentational strategy used to reduce performance pressure and provide a low baseline against which subsequent performance can be compared.