But IQ tests are affected by memory, quite a bit. Memory tests are in fact some of the best ways to measure intelligence, like backwards digit span. Unsurprisin

But IQ tests are affected by memory, quite a bit. Memory tests are in fact some of the best ways to measure intelligence, like backwards digit span. Unsurprisingly, the genetics of memory and IQ overlap as do lots of other cognitive traits (https://en.wikipedia.org/wiki/Genetic_correlation#Intelligence https://en.wikipedia.org/wiki/Genetic_correlation#Intelligen...).