High Ashkenazi IQ partially derived from Haplogroup K?

[Peter Nirsch]

bullshits.

[Prisoner Of Ice]

There was a discussion about this recently centered around an article and some info that NotACop posted. The bottom line was that it wasn't overall brain/brain capacity size but it's proportion to body mass and the "amount of neuron connections". I won't pretend to know anything about the later part but the former was explained due to the amount it would take to faciliate proper movement for bigger limbs/body sizes.

Better nutrition, activity and a need to remember crucial skills and other information would have also made paleolithic people "smarter" and it also showed in these brain capacity to body proportion rations which were obviously much better.

Yeah, I know all about it. To ideal measure the brain you'd do it on a part by part basis, basically the size of the various parts turns out th matter a great deal for people's abilities in those areas. Very social people have larger parts of the brain, math guys have huge parietal lobes and so on.

Encephalization is nothing new, but even without factoring that in, this is still the case. I have a big metastudy on brain size and IQ I posted some time ago, but every time I post some 'racis' study it gets taken down from whatever news agency made the original article, and the studies themselves are usually behind a paywall.

The only ones that argue against it use some hilariously retarded methodology that's designed to fail. Like they will take twins, measure the differences in brain size, then look at the IQ difference. Well obviously the brain size difference in twins will be a lot smaller than the error rate on IQ tests, and it doesn't take into account what I detailed earlier anyway. IE it's not overall size, but size of individual parts. The smarter people actually have a different brain form, and that is the key. That won't show up measuring between twins, but it still shows up when used as a general indicator.

Anyway, africans have much smaller brains, and outside NW europe everyone has much shallower eye sockets which ALSO means they have much smaller prefrontal cortex. Guys like mao tse tung look like they are smart, but that they would murder you for ten cents. You know it instinctively but probably can't guess why you think this. Well, he has no morality center, but huge parietal lobes. This is what causes the archetypical 'big eyes' in comic book villains. This is your brain telling you this person will kill you.

[Prisoner Of Ice]

What I'm saying is the size of individual parts matters, too, but the correlation is still so strong that it has a 0.40 correlation. The only parts of the brain larger due to height after geneally motor function areas. Neanderthals on the other hand were much more encephalized than most people today, though the brains kept growing right up til 20k years ago when they took a sharp nose dive.