Charles Driver
Charles Driver
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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 …
Nov 18, 2022
7 min read
What is Heterogeneity, Really?
It seems a quite common understanding that unit level ‘heterogeneity’ (i.e. individual differences) when using statistical models …
Nov 18, 2022
1 min read
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 …
Last updated on Nov 18, 2022
11 min read
Latent growth curves, state dependent error.
Latent growth curves are a nice, relatively straightforward model for estimating overall patterns of change from multiple, noisy, …
Last updated on Apr 27, 2020
6 min read
Kalman filter vs smoother -- Missing data imputation in ctsem.
ctsem is R software for statistical modelling using hierarchical state space models, of discrete or continuous time formulations, with …
Apr 27, 2020
4 min read
ctsem Quick Start -- Sunspots Damped Linear Oscillator
ctsem is R software for statistical modelling using hierarchical state space models, of discrete or continuous time formulations, with …
Last updated on Nov 18, 2022
4 min read
Binary data in state space models
Generate some data Here we specify a bivariate latent process where the 1st process affects the 2nd, and there are stable individual …
Last updated on Nov 18, 2022
3 min read
Representations of Dynamic Systems -- Problems of SEM / Regression / Discrete Time
Representing Dynamic Systems Building on from the dynamic systems intro in a previous post, to build formal models of dynamic systems, …
Last updated on Nov 18, 2022
6 min read
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