It is similarly important to note that voices span diagnostic categories, yet therapies have been developed primarily for persons with a diagnosis of schizophrenia. Auditory hallucinations have been documented in PTSD with a prevalence of 40%–50%; 37% in bipolar 1 disorder, 30% in borderline personality disorder; 10%–23% in major depression; 14% in obsessive compulsive disorder; 14% in dementia; and 10% in Parkinson disease. The focus to date on schizophrenia spectrum disorders likely reflects these being the diagnoses in which they are