I recently gave a workshop @ cuttingGarden / cuttingEEG Frankfurt on Linear Mixed Models and EEG.
You can find all workshop materials here. They are pluto-notebooks for slides and exercise, and a prerendered HTML. A recording is in the works.
MixedModels.jl is 100x faster than lme4
Intuition behind MixedModels / Item Effects
Mass-univariate random effects over time
Likelihoodratio-test against time