The Communicator Style Measure (CSM) was administered to 731 students in Japanese universities and 520 American students at the University of Hawaii to discover if members of certain ethnic or national groups possessed a style of speaking that distinguished them from members of other groups. The CSM contains 51 randomly ordered items that inquire of subjects if a particular communicative behavior is descriptive of how they perceive their style. The nine behaviors gauged as independent variables are (1) dominant, (2) attentive, (3) friendly, (4) relaxed, (5) contentious, (6) dramatic, (7) animated, (8) open, and (9) impression-leaving. The one dependent variable measured is communicator image. The student responses were analyzed using a procedure for comparing independent samples of unequal size. The results showed that the American and Japanese students were significantly different on all variables except dominance and friendliness. Specifically, the Americans perceived themselves as more attentive, contentious, animated, and impression-leaving than the Japanese and had a stronger image of themselves as communicators. The Japanese saw themselves as more relaxed, dramatic, and open than the Americans. (FL)