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Definitions and measurement of negative symptoms in schizophrenia 

Definitions and measurement of negative symptoms in schizophrenia
Chapter:
Definitions and measurement of negative symptoms in schizophrenia
Author(s):

István Bitter

DOI:
10.1093/med/9780198840121.003.0001
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date: 27 July 2021

Negative symptoms of schizophrenia represent deficits in different domains, e.g. loss or diminution in emotions, thinking and movement. Persistent primary negative symptoms are considered to be part of the schizophrenia disease process and represent an unmet need for treatment, while secondary negative symptoms are associated with positive symptoms of schizophrenia, other mental disorders (e.g. depression, substance abuse), extrapyramidal symptoms, social deprivation, etc. Validated rating scales are helpful in the evaluation and measurement of negative symptoms. Current consensus supports the focus on the following five domains (five ‘As’): blunted affect, alogia, anhedonia, asociality, and avolition.

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