Cognitive Behavioural Therapy (CBT) for offenders targets ‘criminal thinking’ as a factor which contributes towards criminal behaviour. By assuming that this ‘criminal thinking’ is a cognitive deficit which has been learned, CBT focuses on teaching offenders to understand the thinking processes and choices that precede criminal behaviour. CBT programmes aim to build cognitive skills and restructure biased or distorted thinking. Elements of CBT for offenders may include cognitive skills training, anger management, moral development and relapse prevention. CBT can be delivered in correctional and community settings and is used for both adults and young people.This narrative is primarily based on Review 1, a meta-analytic review of 58 studies. It is supplemented by Review 2 (based on 13 studies) which provides evidence on Effect, Mechanisms, and Moderators, Review 3 (based on 12 studies) which provides additional evidence on Mechanisms and Implementation, and Review 4 (based on 8 studies) which contributes evidence to the Moderator and Implementation sections. The crime outcome measured in all four reviews was reoffending.All of the primary studies included in the reviews were based on evidence from the United Kingdom, Canada, New Zealand, and the United States.
Overall, the evidence suggests that CBT has reduced crime.A meta-analysis of outcomes from all 58 studies in Review 1 showed a statistically significant reduction in reoffending of 25% amongst participants who received CBT compared to those who did not. The meta-analysis, containing 8 studies, from Review 2 showed a similar statistically significant reduction in general (23%) and violent (28%) reoffending among those who underwent CBT. Review 1 tested the relationship between different elements of treatment within CBT programmes and levels of participants’ reoffending. It found that the treatment elements which were associated with significantly lower levels of reoffending were cognitive restructuring (a process of learning that guides offenders to see their behaviours as the direct result of the choices they make), anger management, and individual attention for participants outside of group sessions.Review 1 also tested to see if there was a correlation between effect size and study methodology. It found no statistically significant effect: weaker studies found similar levels of reoffending to those with a stronger research design.Finally, Review 1 found no significant difference in levels of reoffending by type of reoffending measure – whether this was re-arrest or reconviction.
Review 1 and 2 were both sufficiently systematic that many forms of bias that could influence the study conclusions could be ruled out. Review 1 considered many elements of validity, conducted relevant statistical analyses and used quality assurance to ensure the accuracy of the information collected from the primary studies. It also took into account the potential effects of publication bias, and only combined studies of similar methodological quality. Review 2 demonstrated a high-quality design in terms of calculating the appropriate effect sizes and considering the heterogeneity of the data. Review 2 also took into account the potential effects of publication bias while conducting a thorough extraction of data from the included studies. However, the review did not sufficiently consider the potential effects of statistical outliers or implement an appropriate weighting scheme based on study sample size.
The reviews suggested the following mechanisms by which CBT might have an effect on crime:Building cognitive skills and restructuring offenders’ thinking: Reviews 1, 2 and 3 noted that CBT is based on the assumption that cognitive deficits and distortions characteristic of offenders are learned rather than inherent. CBT therefore emphasises individual accountability and attempts to teach offenders to better understand the thinking processes and choices thought to immediately precede their criminal behaviour. All cognitive behavioural interventions, therefore, employ a set of structured techniques aimed at building cognitive skills in areas where offenders show deficits and restructuring offenders’ thinking in areas where it is biased or distorted. These techniques typically involve cognitive skills training, anger management, and various supplementary components related to social skills, moral development, and relapse prevention. Relapse prevention is increasingly popular and is aimed at developing cognitive risk-management strategies along with a set of behavioural contracts for avoiding or deescalating the precursors to offending behaviour (e.g., high-risk situations, places, associates, or maladaptive coping responses).
These mechanisms were not empirically tested as the original studies did not provide the necessary information to do so.
The reviews note that the effect of CBT might differ according to a number of moderating factors:
Review 1 conducted a statistical analysis of the effects of what they believed to be the optimal implementation of a CBT i.e. that the participants were moderately high risk offenders, received two sessions per week of high quality implemented CBT for 16 weeks. The programme included anger management techniques and interpersonal problem solving components. The review authors calculated that if there were no drop outs such an optimal programme would lead to a 52% decrease in reoffending compared to a control group who received no treatment. The review authors concluded that the most effective CBT programmes include high quality implementation as represented by low proportions of treatment dropouts, close monitoring of the quality and fidelity of the treatment implementation, and adequate CBT training for the providers.Review 1 observed no significant difference between the level of attrition of participants and the overall levels of reoffending. In comparison, Review 2 found that participants who completed the CBT programme were less likely to re-offend than those who did not (this represented a 42% reduced risk of reconviction for general offences and 56% reduction in risk of reconviction for violence if offenders had completed treatment compared to those who did not). This review found that particular groups of men were less likely to complete the CBT treatment: young, single, from an ethnic minority background or ‘medium risk’ offenders. Review 3 focused on young people in residential treatment who exhibited antisocial behaviour. The review noted that residential programmes may have difficulty in maintaining and generalising changes in behaviour, if peers, family and school cannot be directly included in the treatment programmes. For cognitive behavioural therapy it is important that the treatment includes the opportunity to rehearse new skills and behaviours in the environments where they naturally occur, i.e. in everyday life. Therefore, it is uncertain whether any sustainable treatment effects can be obtained in a context in which the person has been placed against his or her will and where there are very limited contacts with his or her usual environment.
None of the reviews reported any information about the costs of CBT programmes, or any cost/benefit analyses.
There is some discrepancy among reviews as to whether dropping out of the programme has an impact on its effectiveness.
Overall, the evidence suggests that CBT has reduced crime. Specific and significant reductions were observed in both general and violent reoffending amongst adults, young people, and participants of different ethnicities. CBT aims to alter the way in which offenders’ view violence by building cognitive skills, increasing victim empathy, and challenging immature attitudes to crime. Results suggest that CBT is effective in both high-risk and mixed-risk offender groups.Programmes which saw the greatest reductions in reoffending were characterised by more sessions per week, more hours of treatment high quality implementation and programme elements including anger management skills and interpersonal problem solving carried out in a non-institutional environment.
Review 1: Lipsey, M.W., Landenberger, N.A. and Wilson, S.J. (2007) 'Effects of cognitive-behavioral programs for criminal offenders', Campbell Systematic Reviews 2007:6, DOI: 10.4073/csr.2007.6Review 2: Henwood,
K.S., Chou, S., Browne, K.D. (2015) A systematic review and meta-analysis on
the effectiveness of CBT informed anger management, Aggression and Violent
Behavior 25, 280–292.Review 3: Armelius, B.Å. and Andreassen, T.H. (2007) 'Cognitive-behavioral treatment for antisocial behavior in youth in residential treatment', Cochrane Database of Systematic Reviews 2007, Issue 4. Art. No.: CD005650. DOI: 10.1002/14651858.CD005650.pub2.Review 4: Usher, A. M. and Stewart, L. A. (2014) 'Effectiveness of Correctional Programs With Ethnically Diverse Offenders: A Meta- Analytic Study', International Journal of Offender Therapy and Comparative Criminology, Vol 58(2) 209–230 This narrative was prepared by UCL Jill Dando Institute and was co-funded by the College of Policing and the Economic and Social Research Council (ESRC). ESRC Grant title: 'University Consortium for Evidence-Based Crime Reduction'. Grant Ref: ES/L007223/1.
Updated on 19/03/2018