The purpose of this study was to determine the relationship between an instructional supervisor's behavior and personality. A survey instrument was used to determine how frequently 56 supervisors preferred to perform and actually performed 10 major supervisory tasks. The Rokeach Dogmatism Scale was used to measure the individual's belief-disbelief system. The respondents were grouped into three categories according to the level of measured dogmatism, and the data were analyzed with the use of an analysis of variance procedure to determine if personality and behavior were related. Findings indicate that closed-minded supervisors preferred to perform public relations tasks and that open-minded supervisors performed two tasks more frequently: organizing for instruction and evaluating. The effects of personality, however, were not as powerful as expected. (Author/MLF)