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  • Repeated Measures Regression Mixture

    Rights statement: The final publication is available at Springer via http://dx.doi.org/10.3758/s13428-019-01257-7

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Repeated measures regression mixture models

Research output: Contribution to Journal/MagazineJournal articlepeer-review

  • M. Kim
  • M.L. Van Horn
  • T. Jaki
  • J. Vermunt
  • D. Feaster
  • K.L. Lichstein
  • D.J. Taylor
  • B.W. Riedel
  • A.J. Bush
<mark>Journal publication date</mark>1/04/2020
<mark>Journal</mark>Behavior Research Methods
Issue number2
Number of pages16
Pages (from-to)591-606
Publication StatusPublished
Early online date31/05/19
<mark>Original language</mark>English


Regression mixture models are one increasingly utilized approach for developing theories about and exploring the heterogeneity of effects. In this study we aimed to extend the current use of regression mixtures to a repeated regression mixture method when repeated measures, such as diary-type and experience-sampling method, data are available. We hypothesized that additional information borrowed from the repeated measures would improve the model performance, in terms of class enumeration and accuracy of the parameter estimates. We specifically compared three types of model specifications in regression mixtures: (a) traditional single-outcome model; (b) repeated measures models with three, five, and seven measures; and (c) a single-outcome model with the average of seven repeated measures. The results showed that the repeated measures regression mixture models substantially outperformed the traditional and average single-outcome models in class enumeration, with less bias in the parameter estimates. For sample size, whereas prior recommendations have suggested that regression mixtures require samples of well over 1,000 participants, even for classes at a large distance from each other (classes with regression weights of.20 vs.70), the present repeated measures regression mixture models allow for samples as low as 200 participants with an increased number (i.e., seven) of repeated measures. We also demonstrate an application of the proposed repeated measures approach using data from the Sleep Research Project. Implications and limitations of the study are discussed.

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The final publication is available at Springer via http://dx.doi.org/10.3758/s13428-019-01257-7