Transdiagnostic Internet-delivered Intervention for Adolescents With Anxiety and Depression

Inclusion Criteria: * elevated symptoms of anxiety or depression/ internalizing problems (T score\> 60) at intake (based on Youth self-report completed by adolescents) * primary diagnosis of an anxiety/depressive disorder based on DSM-5 criteria according 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 6 weeks before treatment onset * Internet access Exclusion Criteria: * severe mental disorder (psychosis, severe depression, bipolar disorder, based on clinical interview) * any condition that interferes with the protocol implementation (e.g., physical illness or sensory impairment that interferes with behavioral tasks such as exposure, 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 on clinical interview). * Current treatment with benzodiazepines