Recent Posts

Discrete Time Models Using ctsem?

The ctsem marketing department seems to have done a poor job getting out the message that all of the dynamic systems stuff of ctsem – …

Accelerated Longitudinal and Multiple Group Designs in ctsem

This post is motivated by a recent question about how to handle accelerated longitudinal designs in ctsem. In these designs growth over …

What is Heterogeneity, Really?

It seems a quite common understanding that unit level ‘heterogeneity’ (i.e. individual differences) when using statistical models …

Dynamic Systems Modeling in Psychology

What is a dynamic system? Why are they interesting? How do we take bits of the bumbling buzzing confusion around us and pack them into …

Latent growth curves, state dependent error.

Latent growth curves are a nice, relatively straightforward model for estimating overall patterns of change from multiple, noisy, …