Purpose. The rate of sexual reconviction for sexual offenders is known to be low. Sexual reconviction, however, is currently the most commonly used outcome measure in sex offender treatment evaluation studies. It is expected that sex offender treatment programmes will reduce the likelihood of reconviction amongst participants. A low base rate of sexual reconviction means that any reduction in reconviction (which could be attributed to treatment) will be small and unlikely to be statistically significant. This study aimed to assess other offence‐related outcomes for sexual offenders, in addition to reconviction. Methods. The sample comprised 173 sexual offenders who had completed a community sex offender treatment programme. Follow‐up information was collected forthe sample from programme files containing multi‐agency information. Official reconviction rates were also calculated using both Home Office and police data. Results. Collecting evidence of any offence‐related sexual behaviour during this study multiplied the sample's sexual reconviction rate by a factor of 5.3. Conclusions. The results show that broadening the outcome measure under observation indicates a higher level of offence‐related sexual behaviour displayed by sexual offenders than reflected by reconviction data. These results have implications for the outcomes measured in treatment evaluation research for sexual offenders.

The violent reconvictions of a sample of sexual offenders discharged from prison between 1992 and 1996 (who had not been reconvicted of a sexual offence) were examined. The hypothesis was that a proportion of these violent reconvictions would have a sexual motivation. The sample consisted of 104 adult male sexual offenders for whom detailed information regarding their violent reconviction was available. The sample was categorized according to the motivation of the violent reconviction. It was found that a proportion of the violent reconvictions were sexually motivated (12%) and that some of these had resulted from an original charge for a sexual offence. Significant differences were found between the sexual motivation and violent motivation group on the number of criminal history and victim characteristic variables. It was concluded that, in the case of sexual offenders, violent convictions might mask the true motivation of the offence.

The following paper is a reconviction study of 183 sex offenders treated by the Thames Valley Project between 1995 and 1999. Some demographic details are provided about the sample. Subjects were monitored for a mean of 3.9 years. A total of 10 subjects (5.4% of total) were reconvicted for a further sexual offence. A further 19 men (10.3%) either had allegations made against them or committed a behaviour that may have involved or been the preparation for further sexual offending, defined here as ''recidivism''. Details about post-treatment behaviour were drawn from three sources: two national police databases which indicated any formal sexual reconviction and the files kept on each sex offender registered with Thames Valley Project (TVSOGP), a multi-funded community-based sex offender treatment programme. The pre-treatment re-conviction risk status of each man was calculated using part one of the Risk Matrix 2000 algorithm (static factors). Risk levels were compared for those where reconviction, re-offending or recidivism was identified and those where it was not and a correlation was found in the predicted direction although this was not statistically significant. The advantages and limitations of this kind of follow-up study are discussed, together with some recommendations for future research.