The argument for their usefulness is simply the actual experiments preformed. Due to it’s size the military can easily collect a lot of useful information.
> If your measurement is predicting everything, it usually means you are measuring nothing.
The goal of IQ was to predict everything as it's a one dimensional scale. You can always find a better test for any given quality, and frankly should. However, that does not somehow invalidate it's wide ranging utility.
By “wide ranging utility” you mean “detecting and diagnosing mental disabilities” right?
If not: Using IQ for anything else is, at best, quite useless, and at worst, severely problematic as you found out when you heard about scientific racism (such as the eugenics movement).
By useful, I mean saving the US military hundreds of millions of dollars. It's not perfect, and I would argue it's not even very good, but it does work. Which among several reasons is why it's been outlawed for US companies.
Re:Taleb is wrong about IQ
by reasonaway on Tuesday July 30, 2019 @05:24AM
(#20563271)
you keep claiming that there is some threshold above which it does not predict anything even though this contradicts all available evidence. like taleb your beliefs are based on nothing more than unfounded speculation.
No I don’t claim that (even though Taleb might have; didn’t read him thoroughly enough). I say that there is a (muddy) threshold where these tests become useless. They still hold predictive power, but what they do predict is useless.
An IQ of 100 is defined to be the mean intelligence. It is a magic number (albeit not a magic number representing competence). Usually an IQ of 80-90 (around one standard deviation below the average) give you general competence, lower then that and you probably have some mental disabilities (unless the test is badly standardized; which has happened more often then it should have).
IQs above average correlate with loads of desirable things, individuals with higher then average IQ are generally more well spoken, they have higher income, they are quicker to respond to questions, they know more jokes, they are probably more handsome as well (I know; citation needed). These traits are as well desired (if not more) in the criminal world as anywhere else. But this is precisely the problem with considering high IQs. If your measurement is predicting everything, it usually means you are measuring nothing.