The high rates of recidivism suggests that the punishment of prison doesn’t work. In the uk, 30% of young offenders left prison and then went onto reoffend. According to the behaviourist approach, punishment is most effective when it is immediate, which doesn’t happen in custodial sentencing, suggesting why recidivism is so high.Custodial sentencing may be less valuable in society as it shows it cannot always stop criminals from reoffending.