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Related Experiment Videos

Factor invariance and the Life Satisfaction Index.

G A Wilson, J W Elias, L J Brownlee

    Journal of Gerontology
    |May 1, 1985
    PubMed
    Summary

    The 8-item Life Satisfaction Index (LSI) shows a stable factor structure across different age and income groups. This validated index offers reliable measurement for quantitative life satisfaction research.

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    Area of Science:

    • Psychology
    • Sociology
    • Gerontology

    Background:

    • The factor structure of the Life Satisfaction Index (LSI) by Adams (1969) has been questioned for cross-group invariance.
    • Previous research by Hoyt and Creech (1983) proposed reduced factor models for the LSI.

    Purpose of the Study:

    • To investigate the factor structure of the Life Satisfaction Index (LSI) across different demographic groups.
    • To validate a reduced factor model of the LSI for improved cross-group stability.

    Main Methods:

    • Examined two reduced factor models of the LSI, based on Hoyt and Creech's work.
    • Utilized a sample of 791 participants with varying levels of income and age.
    • Employed statistical analyses to assess factor structure invariance.

    Main Results:

    • Confirmed that the 8-item LSI, as proposed by Hoyt and Creech, exhibits a more stable factor structure.
    • The 8-item LSI demonstrated adequate statistical power for quantitative analysis.
    • Found that older and higher-income individuals interpret LSI items similarly.

    Conclusions:

    • The 8-item Life Satisfaction Index is a reliable instrument for measuring life satisfaction across diverse age and income demographics.
    • This validated index supports quantitative research on life satisfaction differences.
    • The findings enhance confidence in using the LSI for cross-group comparisons in life satisfaction studies.

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