Parent-Based Treatment for Adolescent Anxiety

Inclusion Criteria: * Meet criteria for a primary DSM-5 AD, including separation anxiety disorder, social anxiety disorder, generalized anxiety disorder, specific phobia, panic disorder, and agoraphobia (determined by the ADIS-C/P). * Cease all other psychosocial treatment, upon consultation with the project staff and service provider. * Not currently use any psychotropic medication, other than a stable dose (i.e., same dose for a minimum of 6 months prior to enrollment; no changes during course of the study) of a stimulant medication or selective serotonin reuptake inhibitor (SSRI). * Have an eligible and willing participating parent (see parent exclusions below). Exclusion Criteria: Adolescent: * Meet criteria for any DSM-5 disorder more impairing than the most impairing AD (determined by the ADIS-C/P). * Have any of the following disorders: autism spectrum disorder; intellectual disability; neurocognitive disorders; bipolar disorder; schizophrenia and other psychotic disorders; and alcohol and substance use disorders (determined by the Health History Form and ADIS-C/P). * Report a suicide attempt in the last 3 months, or current suicide intent and plans (determined by the ASQ). * Be a victim of past or present undisclosed abuse requiring investigation or ongoing supervision by the Department of Social Services. * Not have sufficient proficiency with the English language to complete assessments. Parents: * Have any of the following: intellectual disability; neurocognitive disorders; untreated bipolar disorder; untreated schizophrenia and other psychotic disorders; and untreated alcohol and substance use disorders (determined by the Health History Form). * Not be living with the adolescent at least 50% of the time for at least one year prior to enrollment. * Not have sufficient proficiency with the English language to complete assessments and treatment.