Abnormal Psychology

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The Nature of Psychopathology and Abnormal Psychology
The Diagnosis of Mental Disorders

Schizophrenia Undifferentiated Type

DSM criteria

A type of Schizophrenia in which symptoms that meet Criterion A are present, but the criteria are not met for the Paranoid, Disorganized, or Catatonic Type.

  • Criterion A

    • delusions
    • hallucinations
    • disorganized speech (e.g., frequent derailment or incoherence)
    • grossly disorganized or catatonic behavior
    • negative symptoms (e.g., affective flattening, alogia, or avolition)


  • * Note: Only one Criterion A symptom is required if delusions are bizarre or hallucinations consist of a voice keeping up a running commentary on the person's behavior or thoughts, or two or more voices conversing with each other.


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