Video walking through my script file (https://github.com/keithlohse/mixed_effects_models) for the Centre for Motor Control 2021 workshop on mixed-effect models.
See also Chapter 3 of the accompanying website: https://keithlohse.github.io/mixed_effects_models/
Here is my playlist of related videos used at the 2018 workshop on longitudinal data analysis for the American Congress of Rehabilitation Medicine:
https://www.youtube.com/playlist?list=PLgUHG-jUShiiUwVyoU8qtK0ZlpSSOxsId
(https://github.com/keithlohse/LMER_Clinical_Science/tree/master/ACRM_2018)