Great talk by Stéphanie Walter (starting at 39:00):
With practical examples, I show why certain animations work better than others and how to find the best timing and duration to build UI animations that “feel right”. I explain how our brain works, why and how animations contribute to improving user experience. And what you need to be careful about to build inclusive and accessible motion and avoid making some people sick.
Be sure to check the post on her website too, as it contains a full writeup, videos, examples, slides, links to extra resources, etc.