The headline is broadly defensible, but the qualifications matter. Effect sizes vary by population, the strongest claims rest on shorter trials, and credible voices push back on how it's typically framed.
This was originally called the basic rest-activity cycle. This was proposed many years ago by Nathaniel Kleitman. It was established to be true within sleep states as I mentioned before. Then it was debated for a long time whether or not these 90-minute cycles also control our ability to focus and perform work in wakeful states and it turns out that they do.
Every Sunday: the week’s new conflicts and verdict changes — and nothing else.
Native comments, Twitter mentions, and Reddit threads about this claim — surfaced together so the conversation isn't fragmented across platforms.
Bookmarking — the dossier-vs-overview split is the right call. Most of the time I want overview; sometimes I want receipts.
Would love a "what would change this verdict" RSS feed. Sign me up if it exists.
the 90inut time block seems to be the one in which the brain can enter a state of focus and alertness and do hard work and focus, focus, focus. And then at about 90 minutes, there's a significant drop in your ability to engage in this mental or physical work.