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Inventory of Life Satisfaction (ILS): A validation study among Portuguese middleaged and older people

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The construct of life satisfaction assumes increased relevance with the awareness that ‘live longer’ is not the only desirable result of the increase of longevity. The main goal of this study is to provide descriptive information about prevalence of three factors with respect to life satisfaction – Health and Safety, Services and Resources, Residence and Sociability. The construction and validation for the Portuguese middle-aged and older population (N=1321) of a life satisfaction instrument was carried through. The proposed three-factor solution provides standard and adequate psychometric requirements for reliable and valid measurement. Therefore Services and Resources, Health and Safety, and Residence and Sociability may be used as determinants of life satisfaction of middle-aged and older people not only considering the heterogeneity of the ageing process itself but also because different groups of older people even within a similar cohort might differ in their experience of life satisfaction.

Keywords: ageing; life satisfaction; validation study

Document Type: Research Article


Affiliations: 1: Universidade Católica Portuguesa, Oporto, Portugal 2: Universidade do Porto, Oporto, Portugal

Publication date: 2011-09-01

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  • The Portuguese Journal of Social Science opens a gateway for the international community to engage with a high calibre of academic work in social sciences produced by Portuguese scholarship. Previous to the publication of this journal, this work remained largely inaccessible to an international readership due to issues with language and translation.
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