Previous research has documented an association between a particular behavioral complex termed Type A, and increased incidence of coronary heart disease. In an effort to define further some of the behavioral characteristics that distinguish Type A subjects from their noncoronary-prone (Type B) counterparts, subjects were administered a test of conceptual impulsivity-reflection. While there were clear sex differences in performance, the results of the present study offered only qualified support for the notion that Type A individuals are more impulsive than Type B individuals. One component of Type A, Speed and Impatience, was shown to be related to increased impulsivity in women, but not in men. The findings suggest the importance of considering the interaction of gender with behavioral subcomponents of the Type A behavior pattern.