Of the following schizophrenia subtypes, which is characterized by only negative symptoms or previous positive symptoms that have lessened in severity or frequency?

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The residual subtype of schizophrenia is characterized by the absence of prominent positive symptoms, or the presence of only mild positive symptoms, with the predominant features being negative symptoms or previous positive symptoms that have lessened in severity or frequency. The other subtypes (undifferentiated, catatonic, and disorganized) all have prominent positive symptoms as part of their diagnostic criteria.

Of the Following Schizophrenia Subtypes, Which Is Characterized by Only