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Classification and Diagnosis of Schizophrenia

Schizophrenia is characterised by a profound disruption of cognition and emotion, which affects a
person's language, thought, perception and even sense of self.

A psychotic illness
Loss of contact with reality
Disruption of thought and emotion

Diagnostic criteria

Positive Symptoms

Delusions: bizarre beliefs that seem…

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C. Duration: Continuous signs of the disturbance persist for at least six months. This six month period
must include at least one month of symptoms (or less if successfully treated) that meet criterion A.
D. Exclusion of mood disorders: No major episodes of depression or elation have occurred
concurrently with…

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Ellason and Ross (1995) point out that people with dissociative identity disorder (DID) actually have
more `schizophrenic' symptoms than people diagnosed with schizophrenia.


20% recover their previous level of functioning.
10% have a lasting improvement.
30% have relapses.
Diagnosis has little predictive validity some people recover and some never…


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