Abstract
This research was supported by research grants MH54263-01 from the National Institute of Mental Health and 94-IJ-CX-0049 from the National Institute of Justice. The authors wish to express their deep appreciation to the staff in the numerous institutions at which we have tested for their considerable commitment of time and energy to our research program. We also thank all the offenders who participated in our research. Special thanks are due to David Cerce and Alison Martino for coordinating the coding of files and organizing all of our data, to Nick Fadden and Karen Fadden for help in coordinating and collecting the Minnesota data, and to Karen Locke for her programming and data processing skills.