Conditions involving disturbances in reality testing, such as delusions, hallucinations, disorganized thinking, or disorganized/abnormal motor behavior.
A disorder involving at least two of five core symptom domains (delusions, hallucinations, disorganized speech, grossly disorganized/catatonic behavior, negative symptoms), with continuous signs persisting for at least six months and significant functional decline.
Distinguish early psychotic symptoms of schizophrenia from mood-episode-related psychotic features and from a substance-induced presentation.