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Abstract: A Therapist Rated Scale of Post-Treatment Functioning

This preconference workshop presents our therapist-rated scale of current sexual offender functioning. The Therapist Rating Scale-2 (TRS-2) contains ten topics scored on two dimensions, namely, intellectual understanding of an issue, and acceptance of/demonstration of an internalization of change. Topics in this scale include interpersonal relationships, self-regulation, and other sexual offender criminogenic issues. The scale is both dynamic and positively phrased (i.e., strengths-based). We have found this scale useful for our clinical work as therapists, and as a method of improving the quality of our communication with parole boards, parole officers and subsequent treatment providers. Preliminary examination of the internal consistency, inter-rater reliability, and predictive ability of the TRS-2 suggest the scale has good psychometric properties. Workshop participants will learn of the psychometric properties of the TRS-2 and receive training in order to be able to score and interpret the measure in order to be able to use it in clinical settings.


Liam E. Marshall, Ph.D., has been providing treatment for and conducting research on, offenders and mental health issues for two decades. Liam has more than 100 publications including four books and has made numerous international conference presentations on offender, violence, aging, and problem gambling, issues. He has delivered trainings for therapists who work with sexual and violent offenders in 17 countries. Liam is a board member and reviewer for a number of international journals. He is currently a consultant and trainer with Rockwood Psychological Services and Researcher/Clinician at Waypoint Centre for Mental Health Care.


William L. Marshall is currently Director of Rockwood Psychological Services which provides treatment and research for various types of offenders, including sexual offenders. Rockwood provides these services in several Canadian Federal penitentiaries and in a centre for mentally disordered offenders as well as for juvenile offenders in various settings. Rockwood also provides therapist trainings in many countries. Bill has over 380 publications including 18 books, the latest of which (Marshall, Marshall, Serran & O'Brien 2011 "A strength-based approach to the treatment of sexual offenders" American Psychological Association, Washington, D.C.) won the "Book of the Year" award from the Society for Sex Therapy and Research. Bill is (or has been) on the Editorial Boards of 17 international journals and was in 2003 elected a Fellow of the Royal Society of Canada for his contributions to science. In 2006, Bill was appointed an Officer of the Order of Canada in recognition of his contributions to making society safer both nationally and internationally. This is the highest honor a Canadian citizen can receive.