The Ontario Institute for Studies in Education (OISE) established a task force to investigate the impact of its activities in two areas, research and development and field development. In the first part of this report, the task force and its work are discussed, and the central issues that the task force is concerned with are defined. In Part Two, selected OISE departments and activities are profiled and reviewed. Findings are presented from a study of OISE faculty, showing their perceptions of the activities' impact on participants. A report on OISE's impact on external constituencies is presented in the third part. Results were gathered from questionnaires sent to over 2000 individuals, including those who had participated in OISE-sponsored workshops or conferences, school trustees, and members of school boards. Also included are an analysis of evaluative statements made by respondents on OISE programs and activities. An annex contains profiles from the following OISE departments: (1) adult education; (2) applied psychology; (3) curriculum; (4) educational administration; (5) educational planning; (6) measurement, evaluation, and computer applications; (7) sociology; (8) special education; (9) the higher education group; and (10) the coordinator of field development. Appendices provide the mandate of the task force, the curricula vitae of the task force members, four OISE background papers presented to the task force, and the questionnaires, in English and French, for respondents external to OISE. (FG)