[lordCarbonFiber]

I avoided mentioning the Flynn effect because it tends to attract naysayers (see below, with some embarrassingly poorly structured studies pulled straight from google).

The argument against the downfall of society stands pretty well on it's own without it though, mostly because there's no evidence the tests are getting easier (regardless of recent score changes a 1600 is still a 1600) and even less evidence the test takes are becoming less accomplished.

[wycs]

What exactly is embarrassing about this study:

http://www.pnas.org/content/pnas/early/2017/01/10/1612113114.

[lordCarbonFiber]

Extrapolating data from 90 years of an isolated island nation to evolutionary timescales is the major assumption. The other weak foundation is the assumption that this gene should correspond to educational level. It was weakly correlated in the early 20th century, less correlated now, and we can't put any weight on to what it actually controls (maybe it's related to IQ, maybe it's delaying gratification, who knows, the writers don't claim to).

I think it's a bold conclusion to leap from one genetic marker doesn't seem as strongly correlated to education levels among Icelanders to "cognitive genomics is on the decline".

[dragonwriter]

> see below

Better to use hyperlinks; order of posts on HN is not immutable.