A. Two or more of the following symptoms present for one month:
3. Disorganized speech
4. Grossly disorganized or catatonic behavior
5. Negative symptoms (ie, affective flattening, alogia, avolition)
B. Decline in social and/or occupational functioning since the onset of illness.
C. Continuous signs of illness for at least six months with at least one month of active symptoms.
D. Schizoaffective disorder and mood disorder with psychotic features have been excluded.
E. The disturbance is not due to substance abuse or a medical condition
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