The document discusses the history and research on effective rehabilitation programs for sex offenders. It covers several key points: 1) Early research in the 1970s concluded rehabilitation programs did not work, but later research from the 1980s onward found that some programs can reduce recidivism, especially those targeting criminogenic needs. 2) Effective programs are based on principles like matching treatment intensity to offender risk level, targeting dynamic risk factors linked to reoffending, and delivering treatment in a way that considers offender characteristics. 3) Cognitive-behavioral programs that teach pro-social thinking skills and address criminal thinking have been shown to change antisocial behavior and reduce recidivism when applied correctly.