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

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

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

ctsem is R software for statistical modelling using hierarchical state space models, of discrete or continuous time formulations, with …