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/sci/ - Science & Math


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10200275 No.10200275 [Reply] [Original]

Okay, so it's pretty well established that brain size and head size correlate to IQ and are responsible for at least some of the IQ variation between races.

Whites with extremely high IQs tend to have obviously large braincases, for example a large forehead, a prominent bulge at the back of the head, or a noticably wide head. High IQ Asians usually have relatively short foreheads and wide heads.

But it seems that the correlation between head size and IQ is less obvious for Indians. Look at any prominent Indian scientist or mathematician. Even though they have IQs of 145 and greater, their heads are pretty small-to-average by Asian and white standards. For example, pic related is Fields medalist Manjul Bhargava.

What is the cause of this? Could it be that the genes that affect Indian IQ don't also affect head size? Do they have differently-shaped skulls? Denser brains?

>> No.10200283
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10200283

another pic

>> No.10200593

>>10200275
Let’s consult a phrenologist to get their insight.

>> No.10200621
File: 32 KB, 400x382, big head ed.jpg [View same] [iqdb] [saucenao] [google]
10200621

>>10200593
phrenology is not craniology brainlet

>> No.10200627

>>10200593
Resident phrenologist here. The size of the frontal lobes makes up for a lack of obvious skull circumference. It really takes an MRI to known the exact size but we can approximate. More intelligent examples of the lesser races tend to be myopic, (indicative of a trait linked to intelligence), so keep that in mind too.

>> No.10200632

>>10200283
Damn dude Maryam was truly an angelic cutie

>> No.10200635

>Okay, so it's pretty well established that I can manipulate any data I want to fit any bias bullshit I have and want to spread

Fixed that for you.

This is also /sci/ in a nutshell which is why I stopped coming on here. Absolute fucking shitfest.

>> No.10200639

>>10200635
You reply to the wrong thread, Mr. bucko buck buckerson? Nice tripple plebbit spacing by the way.

>> No.10200640

>>10200635
the head is only aspect of our anatomy that actually been subject to evolutionary pressure for the last two millions years brainlet, from the neck down homo erectus is indistinguishable from modern man

>> No.10200668

>>10200635
>which is why I stopped coming on here
Yet here you are

>> No.10200693

>>10200275
>Okay, so it's pretty well established that brain size and head size correlate to IQ and are responsible for at least some of the IQ variation between races.

brainlet confirmed

>> No.10200694

>>10200275
IQ is determined by convolutions and wiring. Even if you have a "small" head you can still have lots of folds to maximize surface area. In fact surface area is more important than volume. The idea that brain size explains IQ is 90s pop science. It's like saying a N64 is more powerful than an iphone because it's bigger.

>> No.10200696
File: 25 KB, 1227x597, Brain_Size_Map.png [View same] [iqdb] [saucenao] [google]
10200696

>>10200275
Larger brain size is significantly correlated with higher visuospatial IQ, but less with verbal IQ.

https://www.unz.com/akarlin/cognitive-cliodynamics/

>> No.10200698

>>10200275

The brains of whales and elephants are 10x larger than the brains of humans. Why aren't they enslaving us?

>> No.10200699

>>10200693
look at a black athletes skull compared to their shorter white coach’s next time you’re watching the sportzball
>>10200694
there is a significant correlation between volume and iq, white matter volume and iq; however surface area and complexity are also vital to higher intelligence. No one really knows, the efficiency hypothesis is not supported by recent reviews of research on MRI scans.
>>10200696
never thought about this, thanks

>> No.10200708

>>10200696
This map says italy and senegal have similar brain sizes. How is that possible? How do south americans have similar brain sizes to scandinavians?

>> No.10200711

>>10200708
read the link from unz, it seems its not so simple as big brain>high iq

>> No.10200714

>>10200696
Then why are 90% of Russians dumber than a pile of rocks?

>> No.10200722

>>10200699
>look at a black athletes skull compared to their shorter white coach’s next time you’re watching the sportzball
athletes have higher IQs
http://journals.tubitak.gov.tr/medical/abstract.htm?id=10560
https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0091254

Not surprising given the effects physical exercise has on the brain. IRL Jocks are not dumb at all. Most black athletes come from college educated middle class homes. The poor are not healthy or motivated towards sports.

>> No.10200740

>>10200722
>athletes have higher iq’s
than the general population maybe, if you’re including tennis players, swimmers, white track athletes, rowers and soccer players then im not surprised as those all tend to be preppy tiger mom products. If you mean college football and basketball players, no, those guys are almost universally brainlets and incapable of abstract thinking that’s why they load into business courses.
>the effect physical exercise has on the brain
what? a 1/3 SD increase? that’s not enough to keep pace with genotypically superior STEM nerds who’ve been honing their abstraction and processing speed since elementary school. If you genuinely can’t see that someone like Jimmy Butler or Dwyane Wade has a smaller skull than their coaches you’re not very observant or are maybe a weak visual thinker. I’m not saying that it hurts or wouldn’t help lucidity and memory, im saying that there is no effect on genotypic g, that its not significant effect on phenotypic g, and that no matter what a 3 SD mathfag would be beyond 90+% of college athletes in cognitive function.

The argument regarding symmetry and athleticism makes the most sense in relation to the general population and not high iq subpopulations like engineers, mathematicians and physicists most of whom are not skilled athletes or who at best played highschool sports. I could see long distance running as having a strong correlation with iq even up to 2 SD’s since all the x-country kids in hs were good at math and science, and even swimmers and tennis players too. But, not for the contact sports.

>> No.10200742

>>10200698
because they are underwater you brainlet

>> No.10200767

>>10200694
I dunno, when I look at pictures of eminent scientists and mathematicians, almost all of them have gigantic round heads. Most random people I see on the street have noticibly smaller heads than the type of people one might see walking around Caltech for example.

Probably, people with IQs at a certain level have comparable brain size, but not all people with a certain brain size have comparable IQs.

>> No.10200788

>>10200740
>If you mean college football and basketball players, no, those guys are almost universally brainlets and incapable of abstract thinking that’s why they load into business courses.
There aren't any studies on those specific sports I can find.
>a 3 SD mathfag would be beyond 90+% of college athletes in cognitive function.
The 3 SD mathfag is probably somewhat athletic himself. Especially if he cares about his health later in life.
>The argument regarding symmetry and athleticism makes the most sense in relation to the general population and not high iq subpopulations like engineers, mathematicians and physicists most of whom are not skilled athletes or who at best played highschool sports
Most of the people who go into STEM had strict parents. Strict parents usually force them to be physically active and fit. Most STEMfags I've met visit the gym 5 days a week. IQ manifolds over most positive traits. Health, weight, height, happiness, etc. The best athletes, musicians, chefs, and so on are usually HIGH IQ persons.

>> No.10201087

>>10200275
There's plenty of evidence that iq is defined mostly by amount of connections in the brain rather than raw mass. Race, and different brain sizes, likely have nothing to do with it

Its probably just because children in Africa and poor Asia don't get the nutrition they need and their iq suffers

>> No.10201115

>>10200275
I think it's neantherdal dna. Whites and asians have higher neantherdal dna than indians so maybe that's why their cranial size is larger.

>> No.10201358

>>10201115
>Whites and asians have higher neantherdal dna than indians so maybe that's why their cranial size is larger.
Native americans have the most neanderthal DNA of any racial group.

>> No.10201368
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10201368

>>10200742
The real redpill lies in opposable thumbs, brainletshit.

>> No.10201370

>>10200788
yeah its probably something yet to be seriously looked at since intelligence research has been so touchy for the psyche and neuroscience communities for the last 70 years. The big brain mathfag is probably a good long distance runner and maybe a proficient cyclist or swimmer since from what I have seen high iq people seem to enjoy and seek out cardio and excel in it, all of the State champions in my league and at my hs in those sports were future STEMfags who got full rides at our flagship and high ranked private schools. In terms of explosive athleticism like what’s necessary for baseball, basketball, football this did not hold at all. The best players especially among black students, were typically average or slightly above average students who leveraged their extra curriculars and athletics to get scholarships at schools they wouldn’t have otherwise gotten into. This held at nearly every hub/major hs in my state, while there were many high iq skilled position players I met, most of the elite athletes were brainlets. The dumb jock stereotype is, for these sports, warranted and in general stereotypes tend to be at least a little more true than untrue.
>strict parents force their kids to exercise
I guess, you see tiger moms forcing ballet and swimming on smart daughters, perfectionist fathers asking sons to go hiking, kayaking, mountain bikint and skiing but they tend not to be interested in time intensive, high injury risk contact sports.
>athetes, musicians, chefs
what’s the point of bringing them up? you said athleticism not culinary or musical skill. I don’t think you’re correct anon, it just contradicts what i saw from a very large sample size even among wealthy white kids at elite private schools. The idea that muscular, warrior-pheno socially successful alpha males are spending much time honing cognitive faculties or learning diff eq’s in 9th grade is sort of laughable.

>> No.10201422

>>10200714
malnutrition, alcoholism and awful culture

russians are smart when they're allowed to be smart, look at maths and chess for example

>> No.10201487

>>10200714
Russian culture is pure cancer. I Guess thats what you get when you abandon idealism

>> No.10201604

>>10201358
No it's asians actually.

>> No.10201613
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10201613

>>10200708
Cranial shape. Scandinavians tend to have large heads in absolute terms but are usually also dolichocephalic, while southern americans tend to have smaller heads in absolute terms but are usually also hyperbrachycephalic. Congoids for example have small heads both in absolute terms and tend to be hyperdolichocephalic. Of course, Nordics and Germanics with brachycephalic skulls do exist, I suspect these types make up the intellectual and aristocratic classes.

https://dienekes.blogspot.com/2006/02/cranial-size-and-shape.html

>> No.10201629

>>10200275
He looks retarded, not smart. What kind of autism is this?

>> No.10201689

>>10201370
>what’s the point of bringing them up? you said athleticism not culinary or musical skill.
My point is that high IQ people tend to be better at everything. They're certainly better athletes than normies and that includes contact sports.
>>10201604
50% of native americans carry a diabetes risk gene derived from neanderthals. 10% of Asians have the gene and virtually no whites or blacks has it. Natives definitely have more neanderthal in them than europeans and probably more than asians.

>> No.10201693

>>10201689
forgot to link to the study
https://www.nature.com/articles/nature12828

>> No.10201703

>>10200275

Fuck off OP. The correlation between head circumference and IQ is .4, which is too weak for it to be useful information for most purposes.

>> No.10201722

>>10201703
Head circumference is not really a useful indicator for cranial capacity. See >>10201613

>> No.10201817
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10201817

>>10201629
From the perspective of a non genius, that level of absolute control must seem as foreign as wingdings. If you work on it, that level of focus is achievable, but rarely realized.

>> No.10201821

>>10200635
Yikes!