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

Springer Netherlands
Publication Type:
Journal Article
Quality of Life Research, 2013, 1831, 22 (7), pp. 1831 - 1840
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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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