DSM-II

In DSM-II, this disorder is called Schizophrenia, hebephrenic type

For more information, see Schizophrenia

This psychosis is characterized by disorganized thinking, shallow and inappropriate affect, unpredictable giggling, silly and regressive behavior and mannerisms, and frequent hypochondriacal complaints. Delusions and hallucinations, if present, are transient and not well organized.

DSM-III

For more information, see Schizophrenia

The essential features are marked incoherence and flat, incongruous, or silly affect. There are no systematized delusions althought fragmentary delusions or hallucinations in which the content is not organized into a coherent theme are common. Associated features include grimaces, mannerisms, hypochondriacal complaints, extreme social withdrawal, and other oddities of behavior.

The clinical picture is usually associated with extreme social impairment, poor premorbid personality, an early and insidious onset, and a chronic course without significant remissions.

In other classifications this type is termed Hebephrenic.

Diagnostic Criteria

A type of Schizophrenia in which there are:

A. Frequent incoherence.

B. Absence of systematized delusions.

C. Blunted, inappropriate, or silly affect.

DSM-IV

For more information, see Schizophrenia

The essential features of the Disorganized Type of Schizophrenia are disorganized speech, disorganized behavior, and flat or inappropriate affect. The disorganized speech may be accompanied by silliness and laughter that are not closely related to the content of the speech. The behavioral disorganization (i.e., lack of goal orientation) may lead to severe disruption in the ability to performa activities of daily living (e.g., showering, dressing, or preparing meals). Criteria for the Catatonic Type of Schizophrenia are not met, and delusions or hallucinations, if present, are fragmentary and not organized into a coherent theme. Associated features include grimacing, mannerisms, and other oddities of behavior. Impaired performance may be noted on a variety of neuropsychological and cognitive tests. This subtype is also usually associated with poor premorbid personality, early and insidious onset, and a continuous course without significant remissions. Historically, and in other classification systems, this type is termed hebephrenic.

Diagnostic Criteria

A type of Schizophrenia in which the following criteria are met:

A. All of the following are prominent:

  1. disorganized speech
  2. disorganized behavior
  3. flat or inappropriate affect

B. The criteria are not met for Catatonic Type.

DSM-5

See Schizophrenia

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