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

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


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.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adolescent
  • Adult
  • Aged
  • Aged, 80 and over
  • Female
  • Humans
  • Interviews as Topic
  • Male
  • Middle Aged
  • Perception
  • Personal Satisfaction*
  • Psychometrics
  • Quality of Life / psychology*
  • Regression Analysis
  • Reproducibility of Results
  • Self Report*
  • Socioeconomic Factors
  • Surveys and Questionnaires / standards*
  • Young Adult