|Sex offender group treatment, Larned State Hospital, Kansas|
That is a front-burner question for judges and jurors in sexually violent predator trials. Understandably, before they decide to release someone who has been convicted of sexually molesting a child, they want reassurance that he is sincerely remorseful and has acquired the tools to turn his life around. In short, they want a certificate of rehabilitation attesting to his low risk.
But does formal sex offender treatment really lower risk?
A systematic review found no scientifically rigorous studies that establish a link between treatment completion and a reduced risk of reoffending among men who have sexually abused children.
This isn't altogether fresh news. We knew from earlier research reviews that:
- Any effect of treatment was modest, at best
- Treatment works best for the tiny minority of very high-risk offenders, while possibly aggravating risk for the broad majority of men at lower risk of recidivism
- Older offenders, due mainly to their very low risk, derive no tangible benefits from treatment
|Patient at "treatment program" in Minnesota|
Even broadening the search to include observational studies that lacked experimental designs, the research team found only five studies with a low enough risk of research bias to be deemed reliable. None of the five observational studies demonstrated that formal treatment -- primarily cognitive behavioral therapy with relapse prevention -- impacts sexual reoffending.
High-bias studies, in which the study design introduced a high probability of unreliable findings, were excluded. An example of such research bias would be a study in which treated and untreated offenders differed on a variable known to affect risk. When subjects are not randomly assigned to treatment or control groups, any observed differences between groups may be due to factors outside of the treatment itself.
Treatment in most formal sex offender programs is cognitive behavioral, and relies primarily on manual-based group therapy. For example, group exercises challenge distorted thinking, denial and minimization.
The research team found no minimally adequate studies whatsoever on the efficacy of pharmacological treatment with antiandrogen drugs, more popularly known as "chemical castration." They found this omission "particularly striking," in light of the prominence of this method in public debates.
Can treatment cause harm?
Given "the overall unimpressive treatment effects" that were found, the researchers cautioned clinicians working with sex offenders to consider the potential negative effects of treatment:
"Journeymen" by Ricky Romain (reproduced with permission)"Under certain circumstances, with some people and some interventions, treatment could increase the risk of sexual reoffending. For instance, prolonged or intense interventions for offenders at low risk of relapse, or grouping low risk offenders with those at high risk for reoffending, could result in adverse outcomes."
They especially cautioned against unnecessary treatment of children. With recidivism risk very low among untreated children, treatment may lead to "unjustified stigmatization and could negatively affect the child’s development…. If these children are subjected to excessively intense or inappropriate therapy, this could increase the risk for future antisocial behavior."
The team was headed up by prominent researcher and professor Niklas Långström and included Canadian researcher R. Karl Hanson, psychologist Pia Enebrink, forensic psychiatrist Eva-Marie Laurén and researchers Jonas Lindblom and Sophie Werkö. The research was commissioned and partially funded by the Swedish government.
The Convention on the Protection of Children against Sexual Exploitation and Sexual Abuse, ratified by 27 countries so far, mandates effective treatment to sexual abusers of children, individuals at higher risk of committing such offences, and children with sexual behavior problems.
This mandate is a bit of a problem, given the inconclusive evidence that the dominant treatment approach works.
Manualized, one-size-fits-all approach
"They want to hear that I always have fantasies and that I have more bad ones than good ones. But I don't have bad ones that often. I make up the bad ones. I make them really bad because they won’t leave me alone."
|"Contained" by Ricky Romain (with artist permission)|
The research team cautioned that their failure to find significant effects of treatment should not be interpreted to mean that treatment as currently implemented is ineffective. The low base rates of recidivism among sex offenders make it difficult to find treatment effects without very large sample sizes and long follow-up periods, they point out.
Additionally, an early study out of California provided some evidence that it was not the formal completion of treatment per se that reduced risk but, rather, the internalization of treatment messages and a desire to change -- something that is harder to measure.
The research team issued a call for large-scale, multinational randomized controlled trials. In the meantime, in the absence of solid proof that manualized cognitive-behavioral group therapy works as intended, they recommend a shift to more individualized assessment and treatment.
That's a solid, and very welcome, recommendation.
The study is: "Preventing sexual abusers of children from reoffending: Systematic review of medical and psychological interventions" by Niklas Långström, Pia Enebrink, Eva-Marie Laurén, Jonas Lindblom, Sophie Werkö and R Karl Hanson. It is freely available online from the British Medical Journal (HERE).
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