The central purpose of this study was to identify the role of state field supervision of vocational education in Ohio in relation to change as perceived by supervisors and their reference groups. The primary task was accomplished in part by testing the following hypotheses: (1) The supervisors' reference groups differ in their perception of the ideal role of the Ohio state field supervisor of vocational education in relation to change, (2) The supervisors' reference groups differ in their perception of the actual role of the state field supervisor of vocational education in relation to change, (3) The supervisors' reference groups perceive a difference between the actual role and the ideal role of state field supervision as to orientation toward either continuity or change, and (4) The supervisors and their reference groups differ in their perception of the ideal role and the actual role of state field supervision with reference to the four supervisory functions: administration, evaluation, improvement of instruction, and human relations. Questionnaires using indicators of supervisory behavior which had been validated by a jury of professors were completed by supervisors, vocational teachers and principals. Only hypothesis three was supported by the evidence. The implications of these findings are discussed and the instrument is appended. (Author/JS)