Transdiagnostic Internet-delivered Intervention for Adolescents With Anxiety and Depression

Inclusion Criteria:

• elevated symptoms of anxiety or depression/ internalizing problems (T score> 60) atintake (based on Youth self-report completed by adolescents)

• primary diagnosis of an anxiety/depressive disorder based on DSM-5 criteriaaccording to ADIS-5-C/P interview

• age 13-17

• able to read and understand Romanian language

• Currently unmedicated or on stable and adequate doses of medication for at least 6weeks before treatment onset

• Internet access

Exclusion Criteria:

• severe mental disorder (psychosis, severe depression, bipolar disorder, based onclinical interview)

• any condition that interferes with the protocol implementation (e.g., physicalillness or sensory impairment that interferes with behavioral tasks such asexposure, behavioral activation, unavailable for the next 3 months),

• active suicidal ideation (assessed by child psychiatrist during clinical interview)in the last month

• currently following CBT/ psychotherapy for anxiety/depression, in the last 6 months

• fMRI incompatible (based on safety questionnaire)

• Being diagnosed with an intellectual disability, pervasive developmental disorder,an alcohol and/or substance dependence disorder, reading disabilities (based onclinical interview).

• Current treatment with benzodiazepines