Background Adolescent gambling can lead to significant harms, yet participation rates continue to rise. Interventions targeting gambling reduction have been implemented in this population. However, it is not clear which behavior change techniques (BCTs) and modes of delivery (MOD) are most effective at reducing gambling. Objective The objective of the study was to identify 'promising' BCTs and MODs by systematically reviewing interventions targeting adolescent gambling behavior. 'Promising' was defined as those present in at least 25% of all interventions and in at least two effective interventions. Methods Three databases were searched (PsycINFO, Medline, and Scopus) from database inception to May 2021. Interventions were eligible if they were randomized controlled trials; targeting adolescents (aged 10-25 years); and assessing gambling behavior post-intervention. BCTs were identified using the Behavior Change Technique Taxonomy v1. Results From the initial 3,315 studies, the removal of duplicates and ineligible articles resulted in sixteen studies included in the review. Eleven of these reported successfully reducing gambling behavior. Eighteen BCTs and six MODs were used across the interventions. The BCTs identified as promising were '4.2. Information about antecedents', '4.4. Behavioral experiments', '5.3. Information about social and environmental consequences', and '5.6. Information about emotional consequences'. Promising MODs were 'face-toface', 'computer', and 'playable electronic storage'. Conclusions The study reviewed the content of interventions targeting adolescent gambling behavior. Four BCTs were identified as promising and should therefore be adopted in future interventions. To facilitate the delivery of these techniques, the study also identified three promising MODs. Interventions developed using these BCTs and MODs may successfully reduce adolescent gambling behavior.
KeywordsGambling • Behavior change techniques • Delivery mode • Adolescents 1 3
MethodsWe followed the Preferred Reporting Items for Systematic Reviews and Meta-analyses (PRISMA) guidelines. The study was registered with PROSPERO, CRD42021254657.
Eligibility CriteriaStudies were included if they were randomized controlled trials of interventions targeting a reduction in adolescent (aged 10-25 years) gambling behavior. Gambling behavior was assessed using self-report or objective measures of gambling frequency or gambling expenditure. Studies assessing problem gambling were also included given the importance of this construct in the target literature. The intervention measured differences between the experimental condition and a control group. We excluded studies measuring only gambling cognitions such as urges or desires, unless accompanied by behavioral measures. Studies not published in English language and only including reviews, abstracts, opinion pieces, and letters to the editor were also excluded.