“…Existing transdiagnostic or general measures of anxiety severity typically assess anxiety symptoms but not functional impairment or behavior change (Campbell-Sills et al, 2009;Norman et al, 2011Norman et al, , 2006. For example, the State-Trait Anxiety Inventory (Spielberger et al, 1983), Beck Anxiety Inventory (Beck and Steer, 1993), Hamilton Anxiety Rating Scale (Hamilton, 1959), and Brief Symptom Inventory-18 Anxiety Subscale (Derogatis, 1993) measure the severity of anxiety symptoms but do not assess anxietyrelated avoidance, restricted activities, or impairment in work or social environments, all of which are critical components of anxiety-related psychopathology (Moses and Barlow, 2006;Telch et al, 1995).…”