Click on the following links. Please note these will open in a new window. 

What Works for Female Offenders: A Meta-Analytic Review 
Craig Dowden and D. A. Andrews 
Crime and Delinquency 45(4): 438-452 (1999)

Offender Coercion in Treatment: A Meta-Analysis of Effectiveness 
Karen K. Parhar, J. Stephen Wormith, Dena M. Derkzen, and Adele M. Beauregard 
Criminal Justice and Behavior 35: 1109 – 1135 (2008)

Effectiveness of Sex Offender Treatment for Psychopathic Sexual Offenders 
Dennis M. Doren and Pamela M. Yates 
International Journal of Offender Therapy and Comparative Criminology 52: 234 – 24 (2008)