Life Satisfaction Index (LSI)

Abstract

The Life Satisfaction Index (LSI) is one of the most historically significant and widely utilized psychometric instruments developed to assess Subjective Well-Being (SWB) and satisfaction with life, particularly within the field of Gerontology. Originally introduced by Neugarten, Havighurst, and Tobin in 1961, the LSI moved beyond simple measures of happiness to capture complex cognitive and affective evaluations of an individual’s overall quality of life and sense of successful aging. The original 20-item version (LSIA) has since spawned numerous validated variations, making it a foundational tool for researchers examining psychological adjustment across the lifespan.

Keywords

Life Satisfaction Index, LSI, Life Satisfaction, Subjective Well-Being, Gerontology, Aging, Quality of Life, LSIA, Psychometrics

Authors

Bernice L. Neugarten, Robert J. Havighurst, Sheldon S. Tobin

Purpose

The primary purpose of the Life Satisfaction Index (LSI) is to provide a self-report measure for quantifying an individual’s level of contentment and satisfaction with their current and past life circumstances. It was specifically developed in the early 1960s to facilitate research into the adjustment and well-being of older adults, helping to define and measure the concept of “successful aging.”

The scale aims to capture various dimensions of an individual’s psychological state that contribute to overall life satisfaction, moving beyond transient emotional states to assess a more stable, cognitive evaluation of life achievements and current enjoyment. Its widespread use allows for longitudinal studies and cross-sectional comparisons regarding age, health status, and social engagement.

Construct

The LSI measures the psychological construct of Subjective Well-Being (SWB), operationalized through the lens of life satisfaction. The original authors conceptualized life satisfaction as comprising five specific components that contribute to an older person’s positive appraisal of life:

• Zest vs. Apathy: The degree of enthusiasm and involvement in daily activities.
• Resolution and Fortitude: The acceptance of past failures and a sense of maintaining control and mastery over one’s life.
• Congruence between Desired and Achieved Goals: The perception that one has achieved the major goals set earlier in life.
• Positive Self-Concept: A positive, integrated view of oneself.
• Mood Tone: The pervasive quality of an individual’s mood, characterized by happiness or optimism.

Validity

The validity of the Life Satisfaction Index, across its many variants, has been extensively documented in gerontological literature since its inception. Early studies established concurrent validity by correlating LSI scores with ratings provided by external judges (Wood, Wylie, & Sheafor, 1969).

Further research has supported the construct validity through correlations with other measures of mental health, happiness, and adaptation to aging. For instance, studies examining Spanish elders confirmed the validity of the measure in different cultural contexts (Stock, Okun, & Gómez, 1994). The continued development of shortened and specialized versions, like the Life Satisfaction Index for the Third Age (LSITA), further demonstrates ongoing efforts to refine its validity across specific older adult populations.

Reliability

The Life Satisfaction Index generally demonstrates acceptable to high levels of reliability, although this can vary depending on the specific version (e.g., LSIA, LSIZ) and the population studied. Internal consistency is often assessed using Cronbach’s alpha, with many studies reporting values in the range of .70 to .90 for the various forms, suggesting good homogeneity among the items.

Test-retest reliability has also been investigated, particularly in longitudinal studies. However, some research, such as Abraham’s (1992) cautionary note regarding the short form used with nursing home residents, indicates that reliability coefficients may decrease in highly dependent or clinically fragile populations, necessitating careful interpretation when the scale is administered repeatedly over time.

Factor Analysis

Due to the multi-faceted nature of the original construct, the factor structure of the LSI has been a significant area of debate and research. While Neugarten and colleagues hypothesized five components, subsequent Factor Analysis studies have yielded varied results, leading to the creation of different versions.

Studies often confirm a dominant general factor of overall life satisfaction but suggest sub-factors related to mood, congruence, and activity engagement. Helmes, Goffin, and Chrisjohn (1988) conducted a confirmatory factor analysis to explore the underlying dimensions, contributing to a clearer understanding of how the LSI items group together, thus supporting the use of specific subscales in certain research contexts. The existence of multiple factorially derived versions (LSIA, LSIB, LSIZ) highlights the complexity inherent in measuring subjective well-being.

Instrument

Test Type: Self-Report Questionnaire

Format: Typically a dichotomous or trichotomous response format (Agree, Disagree, or ? for uncertain/undecided).

Language Available: English (Original), Spanish (and many other translated versions due to its international use).

Population Group: Initially designed for older adults (Geriatric population).

Age Group: Typically 60 years and older, though variants are used across the adult lifespan.

Population Details: Used across community-dwelling elders, institutionalized residents, and general adult populations in psychological and sociological research.

Test Methodology: Respondents indicate their level of agreement with statements reflecting their current life circumstances and retrospective feelings. Scoring involves assigning 2 points for agreement with positive items and 0 points for disagreement, and vice versa for negative items. Items marked with ‘?’ are often scored as 1, or omitted depending on the specific variant used.

The original PDF containing the instrument and related measurement information can be downloaded here: www.a4ebm.org/sites/default/files/Measuring Health.pdf

Keywords

LSIA, LSIZ, Successful Aging, Subjective Well-Being, Psychometrics, Health Measurement, Happiness, Gerontology Research

Authors

Author ORCID Identifier: Not provided in source content.

Affiliation Email addresses: Not provided in source content.

Correspondence Address: Not provided in source content.

Permissions & Fee and Test Year

The original Life Satisfaction Index (LSI) was published in 1961. Given its age and status as a foundational academic instrument, the original LSI and its common variants (LSIA, LSIZ) are widely available in the public domain for academic and research use, often without a specific fee, though formal permission may be required depending on the journal or specific variant publisher.

Key variants and their publication years include:

• Life Satisfaction Index A (LSIA): Neugarten, Havighurst, & Tobin (1961)
• Life Satisfaction Index Z (LSIZ): Wood, Wylie, & Sheafor (1969)
• 18-item version: Adams (1969)
• 8-item version (LSIW): James et al. (1986)
• 30-item version: Maynard (1993)
• Life Satisfaction Index for the Third Age – Short Form (LSITA- SF): Barrett, and Murk (2006)

Reference’s

The following key references document the development, analysis, and validation of the Life Satisfaction Index and its variants:

• Neugarten, B.J., Havighurst, R.J., & Tobin, S.S. (1961). The Measurement of Life Satisfaction. Journal of Gerontology, 16, 134-143.
• Wood, V., Wylie, M.L., & Sheafor, B. (1969). An Analysis of a Short Self-Report Measure of Life Satisfaction: Correlation With Rater Judgments. Journal of Gerontology, 24, 465-469.
• Adams, D.L. (1969). Analysis of a Life Satisfaction Index. Journal of Gerontology, 24, 470-474.
• Harris, L. (1975). The myth and reality of aging in America. Washington, DC: National Council on the Aging.
• Helmes, E., Goffin, R.D., Chrisjohn, R.D. (1988). Confirmatory factor analysis of the Life Satisfaction Index. Soc Indicat Res, 45:371–390.
• Abraham, I.L. (1992). Longitudinal reliability of the Life Satisfaction Index (short form) with nursing home residents: a cautionary note.Percept Mot Skills, 75:665–666.
• Stock, W.A., Okun, M.A., Gómez, Benito. J. (1994). Subjective well-being measures: reliability and validity among Spanish elders. Int J Aging Hum Devel, 38:221–235.
• Barrett, A.J., & Murk, P.J. (2006). Life Satisfaction Index for the Third Age (LSITA): A Measurement of Successful Aging. In E. P. Isaac (Ed.), Proceedings of the 2006 Midwest Research-to-Practice Conference in Adult, Continuing, and Community Education (pp. 7-12). St. Louis: University of Missouri-St. Louis.
• McDowell, Ian. (2006). Measuring Health: A Guide to Rating Scales and Questionnaires, Third Edition. OXFORD UNIVERSITY PRESS

Items of the Life Satisfaction Index (LSI)

IMPORTANT: The following scale items must be preserved in their original language and must not be changed in any way.

1. As I grow older‚ things seem better than I thought they would be.
2. I have gotten more of the breaks in life than most of the people I know.
3. This is the dreariest time of my life.
4. I am just as happy as when I was younger.
5. My life could be happier than it is now.
6. These are the best years of my life.
7. Most of the things I do are boring or monotonous.
8. I expect some interesting and pleasant things to happen to me in the future.
9. The things I do are as interesting to me as they ever were.
10. I feel old and somewhat tired.
11. I feel my age‚ but it does not bother me.
12. As I look back on my life‚ I am fairly well satisfied.
13. I would not change my past life even if I could.
14. Compared to other people my age‚ I’ve made a lot of foolish decisions in my life.
15. Compared to other people my age‚ I make a good appearance.
16. I have made plans for things I’ll be doing a month or a year from now.
17. When I think back over my life‚ I didn’t get most of the important things I wanted.
18. Compared to other people‚ I get down in the dumps too often.
19. I’ve gotten pretty much what I expected out of life.
20. In spite of what people say‚ the lot of the average man is getting worse‚ not better.

Scoring Key (Original LSIA 20-Item Version):

• Response Options: Agree, Disagree, ? (Uncertain)
• Positive Items (Scored 2 for Agree, 0 for Disagree): Items 1‚ 2‚ 4‚ 6‚ 8‚ 9‚ 11‚ 12‚ 13‚ 15‚ 16‚ and 19.
• Negative Items (Scored 0 for Agree, 2 for Disagree): Items 3‚ 5‚ 7‚ 10‚ 14‚ 17‚ 18‚ and 20.