The primary aim of the study is to evaluate the feasibility and acceptability of an internet-delivered Adolescent Community Reinforcement Approach (I-A-CRA) with therapist support for young adults (aged 18-24 years) with problematic alcohol use and their caregiver/significant other. Secondary aims include investigating the role of comorbid emotional symptoms, emotion regulation and prosocial behavior in treatment outcomes for the young adults. In a randomized controlled pilot trial, participants (n = 60 young adults as well as an optional accompanying caregiver/significant other) will be recruited from the community through advertisements as well as through clinic referrals in Stockholm, Sweden. Eligible participants will be randomized either to the 10-week I-A-CRA treatment or to an active control group (receiving psychoeducation about alcohol use over the same time frame). In both conditions an optionally accompanying caregiver/significant other will receive a support program in conjunction with the young adult's treatment. Participating young adults will be evaluated with regards to their alcohol use, psychiatric symptoms, emotion regulation, and prosocial behavior at pre-treatment, weekly during treatment, post-treatment, and at a 3-month follow-up. The primary outcome will be feasibility (measured as number of treatment completers; i.e., having completed 5 out of 8 treatment modules), and acceptability (measured by patient satisfaction). Secondary outcomes will include pre- and post-treatment self-rated binge drinking episodes, levels of depression, anxiety and stress, emotion dysregulation, and prosocial behavior. Self-reports regarding stress, emotion dysregulation, and prosocial behavior will be complemented by behavioral measures (computerized tasks).
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Inclusion Criteria: * Young adult between 18-24 years of age * Reporting ongoing substance use (alcohol), heavy drinking measured as risky use according to recommendations: 5/4 (male/female) standard drinks on a minimum of two occasions in the last month, or AUDIT-C ≥ 4 points indicating harmful consumption * Access to internet via computer or other similar device, as well as access to smartphone * If on psychiatric medication, it should have been a stable dosage during the past 3 months prior to pre-treatment assessment * Adequate knowledge in the Swedish language and a Swedish personal identification number Exclusion Criteria: * Current DSM-5 diagnosis for any other substance use disorder except nicotine dependence * Current (including last 12 months) DSM-5 diagnosis for other major psychiatric disorder (bipolar disorder, psychosis) * Recent initiation of psychiatric medication or psychotherapy (within the last 3 months) * Suicidal ideation at screening * Serious somatic diagnosis requiring medical attention, such as uncontrolled diabetes mellitus, epilepsy or heart conditions * Traces of any psychoactive substance (e.g., central stimulant amines, THC, benzodiazepines, opiates, cocaine) in urine sample at baseline assessment * Pregnancy