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1 results

  • A Latent Variable Mixed-Effects Location Scale Model with an Application to Daily Diary Data

  • Shelley A. Blozis
  • Journal:
    Psychometrika / Volume 87 / Issue 4 / December 2022
    Published online by Cambridge University Press:
    01 January 2025, pp. 1548-1570
    • Article
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  • A mixed-effects location scale model allows researchers to study within- and between-person variation in repeated measures. Key components of the model include separate variance models to study predictors of the within-person variance, as well as predictors of the between-person variance of a random effect, such as a random intercept. In this paper, a latent variable mixed-effects location scale model is developed that combines a longitudinal common factor model and a mixed-effects location scale model to characterize within- and between-person variation in a common factor. The model is illustrated using daily reports of positive affect and daily stressors for a large sample of adult women.