[An error of the educated--split personality and schizophrenia].

Objective: Among the public schizophrenia is often thought to denote split personality. Our aim is to identify factors influencing the prevalence of this error. METHODS In a representative population survey in Germany (n=5,025), respondents received an open question about their associations with the word schizophrenia and a closed question how strongly they agree that split personality is a symptom of the disease.

Results: 27% associated split personality with schizophrenia, 67.4% agreed this being a symptom. Higher education was associated with answering/endorsing split personality in both questions. Familiarity with mental illness and living in the old German Laender increased unprompted mention of the concept.

Conclusion: Mistaking schizophrenia for split personality is an error of the well-educated that is not favourably altered by familiarity with mental illness. Targeting this misconception seems to be difficult and could necessitate a new illness denomination.