A weakness of behaviour modification?

-Might not be effective -Blackburn argued that any positive changes in behaviour whilst an offedner is in prison may be fake -Offedners tempted to behave wlel for the token economy to get rewards, means that the economies are doing little to help -Other treatments such as CBT may be more effective as they require the offender to understand the cuase of their offending and take responsibility for themselves -Therefore, suggests that behaviour modification techniques may not be effective in rehabilitating offenders