Abstract
This study examined the measurement invariance and longitudinal trajectories of multidimensional self-perceptions of aging (SPA) and factors that predict between-person variability in the level and change of SPA in middle-aged and older adults. Data were drawn from the German Ageing Survey spanning four waves, covering a 15-year period. Multidimensional SPA was assessed with the Personal Experience of Aging Scale, consisting of three dimensions, physical decline, social loss, and continuous growth. The measurement invariance models across age groups (middle-aged versus older adults) and across time showed a good fit after allowing one item to vary at metric and/or scalar levels. Growth curve models showed only minor declining trajectories in two of the three dimensions of SPA, social loss and continuous growth dimensions, toward more negative views. Participants with poor resources in general were more likely to have negative SPA across all three dimensions. The protective effect of having a spouse was observed on only the social dimension of SPA, supporting a domain-specific effect of having a spouse. The study demonstrates the usefulness of a multidimensional understanding of SPA and recognizes the need for identifying different factors that may promote positive perceptions on aging in different dimensions of life.
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