The relations between attitude toward the act and subjective norm to behavioral intentions were examined from an individual difference perspective. High- and low-self-monitoring American undergraduates indicated how likely they would be to write a letter about pending drinking-age legislation, what their attitudes were toward this behavior, and their subjective norm with respect to this behavior. As expected, the letter-writing intentions of low self-monitors were related to their attitude toward the act. The intentions of high self-monitors were related to perceived normative pressure and attitude toward the act.