this post was submitted on 12 Oct 2025
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Major IQ differences in identical twins linked to schooling, challenging decades of research (www.psypost.org)
submitted 3 days ago by ooli3@sopuli.xyz to c/science@beehaw.org
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[โ€“] iii@mander.xyz 9 points 3 days ago (1 children)

it's not like you will test significantly different now compared to a year ago.

It does. Simple but important things like sleep impact it hard.

I've had it assessed three times in a clinical context, and lowest was almost 10 points different than highest.

[โ€“] GreyEyedGhost@lemmy.ca 3 points 2 days ago

Isn't a standard deviation for IQ 20 points or so? If so, what you're saying is that you took a test 3 times and it gave pretty much the same results all three times.

That's like getting different blood pressure readings at different times and dismissing the validity of blood pressure tests. I and other people can raise blood pressure with a thought. That doesn't negate the value of the test, it just indicates one of its limitations.