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

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

Research output: Contribution to journalArticle (Academic Journal)peer-review

65 Citations (Scopus)


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.
Original languageEnglish
JournalQuality of Life Research
Publication statusPublished - 2012

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