If we think that schizophrenics have several personalities, it surely comes from a misinterpretation of the word “schizophrenia” which literally means “divided mind”.
The schizophrenia which is a psychosis is characterized by a loss of contact with reality and the person who suffers from it is not aware of this … Among the most frequent symptoms: hallucination, delirium …
Having multiple personalities is another mental disorder in its own right, defined by the DSM (reference work for American psychiatrists) and called “multiple personality disorder”. In these cases at least two very distinct personalities take control of the behavior of the person …