Visual analogue scales, standard gambles, and relative risk aversion

Robinson, Angela, Loomes, Graham and Jones-Lee, Michael (2001) Visual analogue scales, standard gambles, and relative risk aversion. Medical Decision Making, 21 (1). pp. 17-27. ISSN 1552-681X

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Abstract

BACKGROUND: It has been argued that visual analog scales (VASs) elicit an individual's measurable value function. The theoretical link between an individual's measurable value function v(.) and his or her von Neumann-Morgenstem utility function u(.) appears to provide a justification for transforming VAS scores into standard gamble (SG) utilities. However, VAS scores have been found to be subject to the effects of context, which casts doubt that the procedure is properly revealing v(.). METHODS: The authors tested for the effects of context on VAS and SG scores. They also explored whether the range-frequency (R- F) model of Parducci offers a means of correcting VAS scores for the effects of context. RESULTS AND CONCLUSIONS: The R-F model may provide a means of correcting VAS scores for the effects of context, but no stable relationship exists between these corrected scores and SG utilities. Hence, there remain no grounds for transforming VAS scores into SG utilities.

Item Type:	Article
Faculty \ School:	Faculty of Medicine and Health Sciences > Norwich Medical School
UEA Research Groups:	Faculty of Medicine and Health Sciences > Research Groups > Health Economics Faculty of Social Sciences > Research Centres > Centre for Behavioural and Experimental Social Sciences
Depositing User:	EPrints Services
Date Deposited:	25 Nov 2010 11:11
Last Modified:	19 Apr 2025 23:58
URI:	https://ueaeprints.uea.ac.uk/id/eprint/14226
DOI:	10.1177/0272989X0102100103

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