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Centre for Policy on Ageing | |
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| Rasch analysis of the International Well-being Index in older adults | | Author(s) | Maria Joao Forjaza1a, Alba Ayala, Carmen Rodriguez-Blazquez |
| Corporate Author | Spanish Research Group on Quality of Life and Ageing |
| Journal title | International Psychogeriatrics, vol 24, no 2, February 2012 |
| Pages | pp 324-332 |
| Source | http://www.journals.cambridge.org/ipg |
| Keywords | Well being ; Measurement ; Spain. |
| Annotation | The International Wellbeing Index (IWI) is a measure of general quality of life formed by two scales: the Personal Wellbeing Index (PWI) and the National Wellbeing Index (NWI). This paper studies the psychometric properties of the PWI and NWI, using Rasch analysis and classic psychometric methods. The PWI and NWI were applied to a representative sample of 1106 community-dwelling adults, aged 60 years and over, residing in Spain. Mean ± standard deviation age was 72.07 ± 7.83 years and 56.3% were women. Five PWI items (achieving in life, relationships, safety, community connectedness, and future security), and five NWI items (economic situation, state of environment, social conditions, business, and national security of the country) fitted the Rasch model. After adjusting the response scale format, satisfactory fit was obtained, with good reliability (person separation index of 0.91 for both the PSI and NWI), local independency of items, and strict unidimensionality. The measures showed adequate external construct validity with related measures. The PWI and the NWI, with fewer items and simpler response scale formats, provided valid and reliable linear measures in older adults, according to Rasch and classic psychometric analyses. (RH). |
| Accession Number | CPA-120821005 A |
| Classmark | D:F:5HH: 3R: 76S |
Data © Centre for Policy on Ageing |
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| ...from the Ageinfo database published by Centre for Policy on Ageing. |
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