These are statistical software programs for analysis of intensive longitudinal data, or other types of data with many within-subject (or cluster) measurements.  MixRegLS allows modeling of the mean, between-subject (BS) variance, and within-subject (WS) variance.  Random effects are included in the mean (location) and WS variance (scale) submodels.  The MixWild program extends MixRegLS in several important ways.  MixWild allows for multiple random location effects (e.g., intercepts and slopes), in addition to a random scale effect.  These random subject effects (multiple location and one scale) can then be used as predictors in a Stage 2 model of a subject-level outcome that could be continuous (multiple regression) or discrete (binary/ordinal logistic regression).  Also, MixWild includes a graphical user interface (GUI) to facilitate program use.

MixWild program

MIXWILD Program User guide and MixWild_Example DataSet

  • Dzubur, E., Ponnada, A., Nordgren, R., Yang, C.-H., Intille, S., Dunton, G., & Hedeker, D. (2020, epub).  MixWILD: A program for examining the effects of variance and slope of time-varying variables in intensive longitudinal data. Behavior Research Methods.  pdf file

MixWild Presentation File 1,  MixWild Presentation File 2

MixRegLS program – this zip file contains the MIXREGLS program, manual, and several examples