- Diagnosis of a schizophrenia spectrum disorder (i.e. schizophrenia, schizophreniform disorder, schizoaffective disorder, delusional disorder, or psychotic disorder NOS), bipolar disorder, severe major depression with psychotic features, and substance-induced psychotic disorder, all assessed according to DSM-IV with the Structured Clinical Interview for DSM-IV Axis I Disorders (SCID-I);