It may be an impossible task like directly observing an electron.
Well, it’s a question to ask everyone who says that the IQ test is culturally biased - go make an unbiased one!
It’s like a woman I once dated who told me she was psychic – I told her to go and collect the million dollar prize from James Randi.
Bluff successfully called. 
https://twitter.com/MBruceS649210/status/1086333260278378497 …
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Creating a test that predicts work performance as well as IQ that doesn't trigger the prohibition on "adverse selection" of minorities is the holy grail of I-O Psychology. No one has succeeded.
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IQ tests are like Azande witch craft. Scientifically bogus but sociologicaly compelling. The point is, if everyone believes iin them, thats good enough.
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Has anyone done a study on how early childhood nutrition and mental stimulation affects I.Q.?
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Google it.
End of conversation
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U need to get a life
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You can’t make a culturally unbiased IQ test as Crystalised Intelligence is largely composed of culturally important knowledge. Do you even CHC?
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