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“A Perfect Storm of Cognitive Degradation”
(www.theguardian.com)
This is a most excellent place for technology news and articles.
We still don't.
https://www.psychologytoday.com/us/blog/the-modern-brain/202403/the-truth-about-dopamine-and-your-brain
But the tiktok algorithm does learn about what holds your attention and what loses it, down to the second of what was playing on your video when you scrolled away.