The effect of environment factors in producing change in the management/personality styles of department chairpersons was examined in this study. The study group, consisting of department chairpersons at Valencia Community College (Florida), and a comparable control group, were administered pre-tests and post-tests on the Myers-Briggs Type Indicator and the Reddin 3-D Management Style Diagnosis Test. Additional information was obtained through interviews with the chairpersons. Treatment on the study group consisted of seven planned management training sessions. In addition, the effects of seven unplanned critical events (statewide budget cut, imposition of enrollment cap, etc.) on both the study group and control group were analyzed. Findings indicated that the training sessions and unplanned critical events had no effect on the department chairpersons' management/personality styles. Additional findings underscored the importance of role definition for department chairpersons and the effects of increased responsibilities. Recommendations were derived for the improvement of educational practices in three areas: training, involvement, and evaluation. Statistical data generated from the study are appended as is a document on the roles and responsibilities of department chairpersons at Valencia developed during one of the training sessions. (Author/JDS)