- Meet the DSM-IV criteria at screening for dissociative disorder, bipolar disorder, major depressive disorder, schizoaffective disorder, schizophreniform disorder, autistic disorder, or primary substance induced psychotic disorder. Other comorbid disorders e.g., attention-deficit hyperactivity disorder (ADHD) are allowed as long as the diagnosis of schizophrenia is the primary diagnosis and the comorbid disorders in the investigator's judgment do not require medication