Combining Treatment Components in Transdiagnostic Therapy for Anxiety and Depression

Inclusion Criteria: 1. Age ≥ 18 years. 2. A diagnosis of an anxiety disorder (generalized anxiety disorder, social anxiety disorder, or panic disorder with or without agoraphobia) and/or mild to moderate major depressive disorder (MDD) according to DSM-5 (American Psychiatric Association, 2022). 3. Danish language proficiency. 4. Ability and willingness to give informed consent. 5. No or stable antidepressant/antianxiety medication (i.e., same dosage for ≥ 8 weeks). 6. Access to either a smartphone, tablet, or computer with video camera. Exclusion Criteria: 1. Severe depression deemed to require more intense psychotherapy or medication. 2. Persistent depressive disorder (i.e., depressive symptoms have persisted for 2 years or more). 3. Non-stabilized medication (see above). 4. Currently receiving other psychotherapy or counseling. 5. Not capable of participating online. 6. Lack of Danish proficiency. 7. A history of bipolar disorder. 8. Current or past psychosis. 9. Substance abuse or dependence judged to require treatment. 10. Suicide risk requiring immediate hospitalization.