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Scale for the Assessment of Negative Symptoms
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    Scale for the Assessment of Negative Symptoms

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    The Scale for the Assessment of Negative Symptoms (SANS) is a rating scale that mental health professionals use to measure negative symptoms in schizophrenia. Negative symptoms are those conspicuous by their absence—lack of concern for one's appearance, and lack of language and communication skills, for example. Nancy Andreasen developed the scale and first published it in 1984. SANS splits assessment into five domains. Within each domain it rates separate symptoms from 0 (absent) to 5 (severe). The scale is closely linked to the Scale for the Assessment of Positive Symptoms (SAPS), which was published a few years later. These tools are available for clinicians and for research.

    Background

    Schizophrenia is a severe mental illness characterized by a range of behaviors, including hallucinations and delusions. Hallucinations refer to disorders involving the sensory systems, and are most often manifested as seeing or hearing things (e.g., voices) that do not exist. Delusions include odd or unusual beliefs such as grandiosity or paranoia. Both hallucinations and delusions are inconsistent with reality. Other symptoms of schizophrenia include bizarre behavior, odd posture or movements, facial grimacing, loss of, or indifference to self-help skills (grooming, washing, toileting, feeding, etc.). Schizophrenia may also be marked by a host of social and communication deficits, such as social withdrawal, odd use of language, including excessive use of made up words (neologisms), incomprehensible combinations of words (word salad) or overall poverty of speech. The symptoms are often classified into two broad categories: positive and negative symptoms. Positive symptoms refer to those behaviors or condition that are present in schizophrenia but that are not present under typical conditions (hallucinations, delusions). Negative symptoms refer to those behaviors that are conspicuous because of their absence (grooming, language, communication). Several measures or rating scales have been developed to assess the positive and negative aspects of schizophrenia.

    Items

    Affective Flattening or Blunting

    • Unchanging Facial Expression
    • Decreased Spontaneous Movements
    • Paucity of Expressive Gestures
    • Poor Eye Contact
    • Affective Nonresponsivity
    • Lack of Vocal Inflections
    • Global Rating of Affective Flattening
    • Inappropriate Affect

    Alogia

    • Poverty of Speech
    • Poverty of Content of Speech
    • Blocking
    • Increased Latency of Response
    • Global Rating of Alogia

    Avolition – Apathy

    • Grooming and Hygiene
    • Impersistence at Work or School
    • Physical Anergia
    • Global Rating of AvolitionApathy

    Anhedonia – Asociality

    • Recreational Interests and Activities
    • Sexual Interest and Activity
    • Ability to Feel Intimacy and Closeness
    • Relationships with Friends and Peers
    • Global Rating of Anhedonia-Asociality

    Attention

    • Social Inattentiveness
    • Inattentiveness During Mental Status Testing
    • Global Rating of Attention
    • Scale for the Assessment of Positive Symptoms (SAPS)

    See also

    • Andreasen NC: Scale for the Assessment of Negative Symptoms (SANS) . Iowa City, University of Iowa, 1984;
    • Andreasen NC. Negative symptoms in schizophrenia. Definition and reliability Arch Gen Psychiatry. 1982 Jul;39(7):784-8.

    PMID 7165477


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