Brain Response Associated With Parent-based Treatment for Childhood Anxiety Disorders

Inclusion Criteria: * Prepubertal * Clinical diagnosis of primary anxiety disorder * Must not have another mental illness more impairing than the most impairing anxiety disorder * IQ of at least 80. Exclusion Criteria: * Neurological disorders (including seizures) * Organic mental disorders, psychotic disorders, or pervasive developmental disorders * High likelihood of hurting themselves or others * Current psychosocial or psychopharmacological treatment * History of neurological illness or head injury with loss of consciousness \> 5 minutes * Vision or physical disability that interferes with seeing stimuli presented briefly on computer screen and/or clicking a mouse button rapidly and repeatedly * Contraindications for MRI scanning (e.g., metal implants, pacemakers, braces, claustrophobia, pregnancy, weight \> 250 pounds).