The Visual Analogue Scale (VAS) is a self-report measure consisting simply of a 10 centimeter line with a statement at each end representing one extreme of the dimension being measured (most often intensity of pain). The respondent gives their indication with a pen mark on the line corresponding to their answer, e.g. the present pain level. It is a widely used, noted for ease of administration. When used to measure pain, it reliably differentiates between sensory and affective pain.
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Reliability and Validity
Scott J, Huskisson EC (1979) Vertical or horizontal visual analogue scales Annals of Rheumatological Disease 38, 560. Revill SI, Robinson JO, Rosen M et al (1976) The reliability of a linear analogue for evaluating pain Anaesthesia 31, 1191 – 8
Downie WW, Leatham PA, Rhind VM et al (1978) Studies with pain rating scales Annals of Rheumatology Disease 37, 378 ñ 381
Administration, Analysis and Reporting
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E.C. Huskisson (1974) Measurement of pain. The Lancet 9, 2, 1127-1131.