German-born Swiss-US physicist Albert Einstein (Photo credit: AFP/Getty Images)

‘IQ tests just measure how good you are at doing IQ tests.’ This is the argument that is almost always made when intelligence-testing is mentioned. It’s often promoted by people who are, otherwise, highly scientifically literate. You wouldn’t catch them arguing that climate change is a myth or that vaccines might cause autism. But saying that IQ tests are useless is just as wrong as these notions: in fact, decades of well-replicated research point to IQ tests as some of the most reliable and valid instruments in all of psychological science.

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