“A massive genetics study relying on fMRI brain scans and DNA samples from over 20,000 people has revealed what is claimed as the biggest effect yet of a single gene on intelligence…” (via New Scientist).

But that is not the most significant aspect of this finding. The effect, although real, was miniscule, accounting for less than 2 points in IQ. So, is it any surprise that the authors conclude that, to the extent that genetics influences intelligence, it is a function of the interplay of multiple genes, not just one?