Looking at the first study, it's not showing a "shift" at all. It's comparing a group of people who recently had covid to a group of people who haven't had covi

Looking at the first study, it's not showing a "shift" at all. It's comparing a group of people who recently had covid to a group of people who haven't had covid. Seems like there's some confounders in there, some of which could correlate to IQ. The second study uses a test with 13 question. I don't think you can ascertain IQ very accurately with a 13 question test (especially if the same test is given to people with a wide range of ages).