A psychotic disorder characterized by severe problems with a person’s thoughts, feelings, behavior, and use of words and language. Psychotic symptoms often include delusions and/or hallucinations. These delusions in schizophrenia are often paranoid and persecutory in nature. Hallucinations are usually auditory and may include hearing voices speaking in the third person, as well as to each other, commenting on the patient's deeds and actions. Schizophrenia does not mean "split personality." Most people develop schizophrenia before 30 years of age with some having their first episode in the teenage years.