Estimating the Reliability of Single-Item Life Satisfaction Measures: Results from Four National Panel Studies
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Life satisfaction is often assessed using single-item measures. However, estimating the reliability of these measures can be difficult because internal consistency coefficients cannot be calculated. Existing approaches use longitudinal data to isolate occasion-specific variance from variance that is either completely stable or variance that changes systematically over time. In these approaches, reliable occasion-specific variance is typically treated as measurement error, which would negatively bias reliability estimates. In the current studies, panel data and multivariate latent state-trait models are used to isolate reliable occasion-specific variance from random error and to estimate reliability for scores from single-item life satisfaction measures. Across four nationally representative panel studies with a combined sample size of over 68,000, reliability estimates increased by an average of 16% when the multivariate model was used instead of the more standard univariate longitudinal model.
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- Estimating the Reliability of Single-Item Life Satisfaction Measures: Results from Four National Panel Studies
Social Indicators Research
Volume 105, Issue 3 , pp 323-331
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- Life satisfaction
- STARTS model
- Longitudinal analyses
- Panel studies
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