Vertical and horizontal visual analogue scales have been compared in the measurement of pain. There was a good correlation between the 2 scales, but the scores from horizontal scales tended to be slightly lower than those from vertical scales.
CITATION STYLE
Scott, J., & Huskisson, E. C. (1979). Vertical or horizontal visual analogue scales. Annals of the Rheumatic Diseases, 38(6), 560. https://doi.org/10.1136/ard.38.6.560
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