Transdiagnostic Internet-delivered REBT Intervention for Adolescents' Internalizing Problems

The Efficacy and Mechanisms of Change of a Transdiagnostic Internet-delivered REBT Intervention for Adolescents With Internalizing Problems: A Randomized Controlled Trial

To investigate the efficacy and mechanisms of change of an Internet-delivered transdiagnostic REBT intervention for adolescents with internalizing problems.

The main objectives of this study are to evaluate the efficacy and mechanisms of change of an Internet-delivered Rational Emotive Behavior Therapy for adolescents (12-15 years) diagnosed with a principal anxiety or depressive disorder according to DSM-5 criteria. Participants will be randomly allocated to one of the two groups: experimental (REBTonAd) and waitlist control. The intervention is structured in 8 modules and will be delivered over six weeks. Assessments will be conducted at four time points: baseline, post-treatment, 3-month follow-up, and 6-month follow-up.

Inclusion Criteria:

• Age between 12 and 15 years
• A principal diagnosis of Social Anxiety Disorder, Generalized Anxiety Disorder, Panic Disorder, Persistent Depressive Disorder, or Major Depressive Disorder as defined by DSM-5 (APA, 2013)
• Not currently following another treatment (psychotherapy, pharmacological treatment);
• Internet access
• Ability to read and write Romanian

Exclusion Criteria:

• Suicidal ideation
• Severe depression
• Any physical and mental health acute problem that requires hospitalization
• Diagnosed with autism spectrum disorder, psychosis, bipolar disorder or mental disability