Confirmatory Factor Analysis of the Life Satisfaction Index

Factor models of the construct of well-being in later life have shown mixed results. Here we evaluated the factor structure of the Life Satisfaction Index A (LSIA), a widely used measure. Confirmatory factor analyses using a sample of community living aged people (N = 187) suggested that a unidimensional model was not appropriate for the scale. Moreover, only two of the 10 models previously proposed for the LSIA was found to fit reasonably well. These models (Bigot, 1974; Hoyt and Creech, 1983) consisted of only eight of the 20 LSIA items. Models which utilized all 20 LSIA items tended to fit poorly, whereas, those based on subsets of items generally showed improved fit. Allowing correlated factors also improved the fit. Throughout, fit indices were computed using the Satorra-Bentler scaled test statistic because the data were not normally distributed. These results highlight the importance of theory and construct development prior to actual scale development in social indicators research.