Three central questions are addressed in this investigation, in order to evaluate the impact of Functional Unit Management within the correctional environment under scrutiny: the social climates in each of the three types of institutions as perceived by their staffs, and their differences, if any; the social climates in the same types of institutions as perceived by their inmate populations and their possible differences; and a comparison of the perceptions of the social climates within the same institutions as perceived by both staffs and inmates and their differences. The purpose of the study is to contribute to the existing knowledge of correctional problems with a view to improving correctional programs. The body of the report is composed of the theoretical background and related studies, the setting and research design, and a discussion of the development and use of the instruments used in the study. Also included are the analysis of the data, their interpretation, conclusions, and 20 analytical tables. Appendixes give correctional Institutions Environmental Scales, scoring keys, and subscale descriptions. Approximately 80 references are appended.