• H Fisher, F E M Gardner, and P Montgomery.
• Cochrane Db Syst Rev. 2008 Apr 16 (2): CD007008.

BackgroundMany studies document a robust and consistent relationship between gang membership and elevated delinquency, with gang members disproportionately involved in crime compared to non-gang peers. Research also indicates that both delinquent youth and youth who join gangs often show a wide range of deficient or distorted social-cognitive processes compared to non-delinquent peers. Cognitive-behavioural interventions are designed to address cognitive deficits in order to reduce maladaptive or dysfunctional behaviour, and studies have documented their positive impact on a number of behavioural and psychological disorders among children and youth.ObjectivesTo determine the effectiveness of cognitive-behavioural interventions for preventing youth gang involvement for children and young people (ages 7-16).Search StrategyElectronic searches of ASSIA, CINAHL, CJA, Cochrane Library, Dissertations Abstracts A, EMBASE, ERIC, IBSS, LILACs, LexisNexis Butterworths, MEDLINE, NCJR Service Abstracts Database, PsycINFO, and Sociological Abstracts, to April 2007. Reviewers contacted relevant organisations, individuals, and list-servs and searched pertinent websites and reference lists.Selection CriteriaAll randomised controlled trials or quasi-randomised controlled trials of interventions with a cognitive-behavioural intervention as the majority component, delivered to youth and children aged 7-16 not involved in a gang.Data Collection And AnalysisSearching yielded 2,284 unduplicated citations, 2,271 of which were excluded as irrelevant based on title and abstract. One was excluded following personal communication with investigators. One citation, of a large randomised prevention trial, awaits assessment; personal communication with study authors yielded unpublished reports addressing gang outcomes, but insufficient detail precluded determining inclusion status. Seven remaining reports were excluded as irrelevant because they were narrative reviews or descriptions of programs without evaluations, did not address a gang prevention programme, or did not address a gang prevention program that included a cognitive-behavioural intervention. The remaining four full-text reports excluded because of study design, leading to 0 included studies.Main ResultsNo randomised controlled trials or quasi-randomised controlled trials were identified.Authors' ConclusionsNo evidence from randomised controlled trials or quasi-randomised controlled trials exists regarding the effectiveness of cognitive-behavioural interventions for gang prevention. Four evaluations of Gang Resistance Education and Training (GREAT) have been conducted, two of which were part of a US national evaluation, but all were excluded based on study design. Reviewers conclude there is an urgent need for rigorous primary evaluations of cognitive-behavioural interventions for gang prevention to develop this research field and guide future gang prevention programmes and policies.

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