Tuyển tập các báo cáo nghiên cứu về hóa học được đăng trên tạp chí sinh học đề tài : Impact of discussion on preferences elicited in a group setting | BioMed Central Health and Quality of Life Outcomes Research Open Access Impact of discussion on preferences elicited in a group setting Ken Stein 1 Julie Ratcliffe2 Ali Round1 Ruairidh Milne3 and John E Brazier2 Address 1Peninsula Technology Assessment Group Peninsula Medical School Universities of Exeter and Plymouth Exeter EX2 5DW UK 2University of Sheffield UK and 3National Coordinating Centre for Health Technology Assessment University of Southampton UK Email Ken Stein - Julie Ratcliffe - Ali Round - Ruairidh Milne - rm2@ John E Brazier - Corresponding author Published 29 March 2006 Received 30 January 2006 Health and Quality of Life Outcomes2006 4 22 doi 1477-7525-4-22 Accepted 29 March 2006 This article is available from http content 4 1 22 2006Stein et al licensee BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License http licenses by which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. Abstract Background The completeness of preferences is assumed as one of the axioms of expected utility theory but has been subject to little empirical study. Methods Fifteen non-health professionals was recruited and familiarised with the standard gamble technique. The group then met five times over six months and preferences were elicited independently on 41 scenarios. After individual valuation the group discussed the scenarios following which preferences could be changed. Changes made were described and summary measures mean and median before and after discussion compared using paired t test and Wilcoxon Signed Rank Test. Semi-structured telephone interviews were carried out to explore attitudes to discussing preferences. These were transcribed read by two investigators and emergent .
