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The Validity of Person Tradeoff Measurements: Randomized Trial of Computer Elicitation Versus Face-to-Face Interview

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  • Laura J. Damschroder
  • Jonathan Baron
  • John C. Hershey
  • David A. Asch
  • Christopher Jepson
  • Peter A. Ubel

Abstract

Can person tradeoff (PTO) value judgments be elicited by a computer, or is a face-to-face interview needed? The authors randomly assigned 95 subjects to interview or computer methods for the PTO, a valuation measure that is often difficult for subjects. They measured relative values of foot numbness, leg paralysis, and quadriplegia (all 3 pairs) at 2 reference group sizes (10 or 100). Relative values did not differ between computer and interview. Overall, 21% of responses were equality responses, 13% were high extreme values, and 5% violated ordinal criteria. The groups did not differ in these measures. The authors also assessed consistency across reference group size (10 v. 100). Although relative values were significantly lower for 100 than for 10, mode did not influence the size of this effect. Subjects made, on average, equally consistent judgments for the 3 comparisons. A computerized PTO elicitation protocol produced results of similar quality to that of a face-to-face interview.

Suggested Citation

  • Laura J. Damschroder & Jonathan Baron & John C. Hershey & David A. Asch & Christopher Jepson & Peter A. Ubel, 2004. "The Validity of Person Tradeoff Measurements: Randomized Trial of Computer Elicitation Versus Face-to-Face Interview," Medical Decision Making, , vol. 24(2), pages 170-180, March.
    • Handle: RePEc:sae:medema:v:24:y:2004:i:2:p:170-180
    DOI: 10.1177/0272989X04263160
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    References listed on IDEAS

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    1. Ubel, Peter A. & Loewenstein, George & Scanlon, Dennis & Kamlet, Mark, 1998. "Value measurement in cost-utility analysis: explaining the discrepancy between rating scale and person trade-off elicitations," Health Policy, Elsevier, vol. 43(1), pages 33-44, January.
    2. Jose–Luis Pinto Prades, 1997. "Is the Person Trade‐off a Valid Method for Allocating Health Care Resources?," Health Economics, John Wiley & Sons, Ltd., vol. 6(1), pages 71-81, January.
    3. Jan Abel Olsen, 1994. "Persons vs years: Two ways of eliciting implicit weights," Health Economics, John Wiley & Sons, Ltd., vol. 3(1), pages 39-46, January.
    4. Alan Diener & Bernie O'Brien & Amiram Gafni, 1998. "Health care contingent valuation studies: a review and classification of the literature," Health Economics, John Wiley & Sons, Ltd., vol. 7(4), pages 313-326, June.
    5. Paul Dolan & Colin Green, 1998. "Using the person trade‐off approach to examine differences between individual and social values," Health Economics, John Wiley & Sons, Ltd., vol. 7(4), pages 307-312, June.
    6. Erik Nord & Jose Luis Pinto & Jeff Richardson & Paul Menzel & Peter Ubel, 1999. "Incorporating societal concerns for fairness in numerical valuations of health programmes," Health Economics, John Wiley & Sons, Ltd., vol. 8(1), pages 25-39, February.
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    1. repec:cup:judgdm:v:1:y:2006:i::p:118-133 is not listed on IDEAS
    2. Jose-Luis Pinto-Prades & Jorge-Eduardo Martinez-Perez & Jose-Maria Abellan-Perpinan, 2006. "The influence of the ratio bias phenomenon on the elicitation of health states utilities," Judgment and Decision Making, Society for Judgment and Decision Making, vol. 1, pages 118-133, November.
    3. Erik Nord & Jose Luis Pinto & Jeff Richardson & Paul Menzel & Peter Ubel, 1999. "Incorporating societal concerns for fairness in numerical valuations of health programmes," Health Economics, John Wiley & Sons, Ltd., vol. 8(1), pages 25-39, February.
    4. Doctor, Jason N. & Miyamoto, John & Bleichrodt, Han, 2009. "When are person tradeoffs valid?," Journal of Health Economics, Elsevier, vol. 28(5), pages 1018-1027, September.
    5. Al-Janabi, Hareth & Wittenberg, Eve & Donaldson, Cam & Brouwer, Werner, 2022. "The relative value of carer and patient quality of life: A person trade-off (PTO) study," Social Science & Medicine, Elsevier, vol. 292(C).

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