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Test–Retest Reliability of Capability Measurement in the UK General Population

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  • Hareth Al‐Janabi
  • Terry N. Flynn
  • Tim J. Peters
  • Stirling Bryan
  • Joanna Coast

Abstract

Although philosophically attractive, it may be difficult, in practice, to measure individuals' capabilities (what they are able to do in their lives) as opposed to their functionings (what they actually do). To examine whether capability information could be reliably self‐reported, we administered a measure of self‐reported capability (the Investigating Choice Experiments Capability Measure for Adults, ICECAP‐A) on two occasions, 2 weeks apart, alongside a self‐reported health measure (the EuroQol Five Dimensional Questionnaire with 3 levels, EQ‐5D‐3L). We found that respondents were able to report capabilities with a moderate level of consistency, although somewhat less reliably than their health status. The more socially orientated nature of some of the capability questions may account for the difference. © 2014 The Authors Health Economics Published by John Wiley & Sons Ltd.

Suggested Citation

  • Hareth Al‐Janabi & Terry N. Flynn & Tim J. Peters & Stirling Bryan & Joanna Coast, 2015. "Test–Retest Reliability of Capability Measurement in the UK General Population," Health Economics, John Wiley & Sons, Ltd., vol. 24(5), pages 625-630, May.
    • Handle: RePEc:wly:hlthec:v:24:y:2015:i:5:p:625-630
    DOI: 10.1002/hec.3100
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    References listed on IDEAS

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    1. Smith, Richard D., 2005. "Sensitivity to scale in contingent valuation: the importance of the budget constraint," Journal of Health Economics, Elsevier, vol. 24(3), pages 515-529, May.
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    5. Richard Cookson, 2003. "Willingness to pay methods in health care: a sceptical view," Health Economics, John Wiley & Sons, Ltd., vol. 12(11), pages 891-894, November.
    6. Stirling Bryan & Lisa Gold & Rob Sheldon & Martin Buxton, 2000. "Preference measurement using conjoint methods: an empirical investigation of reliability," Health Economics, John Wiley & Sons, Ltd., vol. 9(5), pages 385-395, July.
    7. Coast, Joanna & Flynn, Terry N. & Natarajan, Lucy & Sproston, Kerry & Lewis, Jane & Louviere, Jordan J. & Peters, Tim J., 2008. "Valuing the ICECAP capability index for older people," Social Science & Medicine, Elsevier, vol. 67(5), pages 874-882, September.
    8. Terry N. Flynn & Elisabeth Huynh & Tim J. Peters & Hareth Al‐Janabi & Sam Clemens & Alison Moody & Joanna Coast, 2015. "Scoring the Icecap‐a Capability Instrument. Estimation of a UK General Population Tariff," Health Economics, John Wiley & Sons, Ltd., vol. 24(3), pages 258-269, March.
    9. Joanna Coast & Richard Smith & Paula Lorgelly, 2008. "Should the capability approach be applied in Health Economics?," Health Economics, John Wiley & Sons, Ltd., vol. 17(6), pages 667-670, June.
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    1. Helena Hörder & Susanne Gustafsson & Therese Rydberg & Ingmar Skoog & Margda Waern, 2016. "A Cross-Cultural Adaptation of the ICECAP-O: Test–Retest Reliability and Item Relevance in Swedish 70-Year-Olds," Societies, MDPI, vol. 6(4), pages 1-6, September.
    2. Sebastian Himmler & Job Exel & Werner Brouwer, 2020. "Estimating the monetary value of health and capability well-being applying the well-being valuation approach," The European Journal of Health Economics, Springer;Deutsche Gesellschaft für Gesundheitsökonomie (DGGÖ), vol. 21(8), pages 1235-1244, November.
    3. Tellez, Juan & Krishnakumar, Jaya & Bungener, Martine & Le Galès, Catherine, 2016. "Capability deprivation of people with Alzheimer's disease: An empirical analysis using a national survey," Social Science & Medicine, Elsevier, vol. 151(C), pages 56-68.
    4. Cassandra Mah & Vanessa K. Noonan & Stirling Bryan & David G. T. Whitehurst, 2021. "Empirical Validity of a Generic, Preference-Based Capability Wellbeing Instrument (ICECAP-A) in the Context of Spinal Cord Injury," The Patient: Patient-Centered Outcomes Research, Springer;International Academy of Health Preference Research, vol. 14(2), pages 223-240, March.

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