Schedule for Deficit Syndrome

Schedule for Deficit Syndrome

An instrument for dividing schizophrenic patients into those with or without deficit syndrome.

SDS Criteria
Criterion 1
Negative symptoms:
• Restricted affect;
• Diminished emotional range;
• Poverty of speec;
• Curbing of interests;
• Diminished sense of purpose;
• Diminished social drive.

Criterion 2
Two or more negative symptoms (above) present for the preceding 12 months, and always present during periods of clinical stability.

Criterion 3
Negative symptoms are primary—i.e., not secondary to factors other than the disease process (e.g., anxiety, drug effect, depression, suspiciousness and other psychotic symptoms).
 
Criterion 4
Patient must be schizophrenic per DSM-IV criteria.
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