Myth / Schizophrenia is split personality or Multiple Personality Disorder.

Fact / Schizophrenia is often confused with split personality. They are NOT the same thing. The confusion arose because the word schizophrenia comes from two Greek roots meaning "split mind." The splitting or fragmentation referred to is the breakdown of an individual’s thinking and feeling processes, not a division of the person into two separate personalities. The popular use of the word "schizophrenic" to describe a mixture of contradictory qualities is completely different from the correct psychiatric use of the term.
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