First Report of the Collaborative Outcome Data Project on the Effectiveness of Psychological Treatment for Sex Offenders

@article{Hanson2002FirstRO,
  title={First Report of the Collaborative Outcome Data Project on the Effectiveness of Psychological Treatment for Sex Offenders},
  author={R. Karl Hanson and Arthur Gordon and Andrew J. R. Harris and Janice K. Marques and William Murphy and Vernon l. Quinsey and Michael C. Seto},
  journal={Sexual Abuse: A Journal of Research and Treatment},
  year={2002},
  volume={14},
  pages={169-194}
}
This meta-analytic review examined the effectiveness of psychological treatment for sex offenders by summarizing data from 43 studies (combined n = 9,454). Averaged across all studies, the sexual offence recidivism rate was lower for the treatment groups (12.3%) than the comparison groups (16.8%, 38 studies, unweighted average). A similar pattern was found for general recidivism, although the overall rates were predictably higher (treatment 27.9%, comparison 39.2%, 30 studies). Current… 
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