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. 2013 Sep;22(7):1831-40.
doi: 10.1007/s11136-012-0293-5. Epub 2012 Oct 20.

An investigation of the construct validity of the ICECAP-A capability measure

Hareth Al-Janabi  1 , Tim J Peters, John Brazier, Stirling Bryan, Terry N Flynn, Sam Clemens, Alison Moody, Joanna Coast
Affiliations

An investigation of the construct validity of the ICECAP-A capability measure

Hareth Al-Janabi et al. Qual Life Res. 2013 Sep.

Abstract

Purpose: To investigate the construct validity of the ICECAP-A capability wellbeing measure.

Methods: A face-to-face interview-administered survey was conducted with 418 members of the UK general population, randomly sampled from the Postcode Address File. Pre-specified hypotheses were developed about the expected associations between individuals' ICECAP-A responses and their socio-economic circumstances, health and freedom. The hypotheses were investigated using statistical tests of association.

Results: The ICECAP-A responses and scores reflected differences across different health and socioeconomic groups as anticipated, but did not distinguish individuals by the level of local deprivation. Mean ICECAP-A scores reflected individuals' perceived freedom slightly more closely than did measures of health and happiness.

Conclusion: This study suggests that the ICECAP-A measure can identify expected differences in capability wellbeing in a general population sample. Further work could establish whether self-reported capabilities exhibit desirable validity and acceptability in sub-groups of the population such as patients, social care recipients and informal carers.

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