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this post was submitted on 12 Oct 2025
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I fail to see how this is relevant to the article mentioned? I mean, IQ tests are reproducable, it's not like you will test significantly different now compared to a year ago.
My own experience is that you can get significantly different results when re-testing, even within a short time frame.
From what I remember about them, you will especially get different results if you test again within a short time span. After a year there should only be differences due to other circumstances, like stress or other stuff that influences the workings of the mind.
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.
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.
Being reproducible does not mean the test is correct. I can reproducible do wrong math too.
And does that mean we should be skeptical of math tests too?
That's not the point. Math is well defined and can be checked outside of tests if it is wrong or false. We can't do that with IQ tests. But that is a separate issue. We have no way of knowing if the IQ tests are sufficient, because it includes more than "math". And are not well defined either.
Edit: The point is, something being reproducable does not mean its correct.