Single- and Multi-Item Life Satisfaction in Adolescence: Measurement Properties, Convergence, and Domain Associations
This study of over 6,000 adolescents across 24 countries demonstrates that while the five-item Satisfaction With Life Scale (SWLS) and single-item Overall Life Satisfaction (OLS) are strongly correlated, they exhibit distinct associations with specific life domains and varying measurement invariance, indicating that researchers should select between them based on specific analytical needs rather than assuming their equivalence.