The U.S. black white IQ gap has been about 1 standard deviation (σ) since WWI (Jensen 1998, Pumpkin Person 2016). How much of this can be explained by biology?
Well we know the brain size gap is about 1.08 σ (at least as of 1980) (Pumpkin Person 2024)
The gap in polygenic education scores between U.S. whites and Nigerians is 1.6 σ (Piffer, June 4, 2020), however because U.S. blacks are about a quarter white genetically (Bryc et al. 2015), we can arguably reduce this by a quarter to 1.2 σ.
In other words, the U.S. black-white gap in brain size, polygenic education level, and IQ are all about 1 σ.
Predicting the black-white IQ gap from brain size & genetic education
Polygenic education scores now explain about 8.7% of the variation in Peabody verbal scores (Okbay et al 2022) suggesting a correlation of 0.29 (the square root of 8.7%), but since vocabulary tests “only” correlate 0.74 with general intelligence ( McCrea & Robinson, 2011) we can arguably divide this correlation by 0.74 and estimate that polygenic education scores (at least the best ones), much like brain size, correlate about 0.4 with IQ.
So knowing both phenotypic brain size and genetic education both correlate about 0.4 with phenotypic IQ, how well do these variables predict the U.S. black-white IQ gap?
Well assuming these two variables are independent, aside from their shared correlation with IQ, we’d expect them to correlate about 0.16 with each other (the product of their shared 0.4 correlation with IQ) and thus each would independently correlate 0.37 with IQ.
In other words:
Phenotypic IQ gap = 0.37(phenotypic brain size gap) + 0.37(genetic education gap)
Phenotypic IQ gap = 0.37(1.08 σ ) + 0.37(1.2 σ)
Phenotypic IQ gap = 0.4σ + 0.44σ
Phenotypic IQ gap = 0.84 σ
In other words, about 84%, or 13 of the 15 point U.S. black-white IQ gap can be explained by known biology. Of course that doesn’t prove it’s 84% genetic as the phenotypic brain size gap could be at least partly environmental in origin.
Jensen predicted 80% of the variation in adult IQ was explained by genes and the remaining 20% was explained by biological environment. Jensen’s default hypothesis thus predicts √ 80% = 89% of the 15 point gap (13 points) will ultimately be explained by DNA, and the remaining 2 points will probably be explained by racial differences in prenatal environment.
Pumpkin Person 
i think polygenic scores are more valid in quantifying intelligence when they use educational attainment as the marker in qualification of how polygenic scores are formed.
its ironic because instead of using general intelligence markers in their polygenic scores they use educational attainment which does a better job than using the gen-int directly.
do you find this strange PP?
No I don’t find it strange at all. The reason polygenic education scores better predict IQ than polygenic IQ scores themselves is that we have reliable data on the education level of 3 million genotyped people. It’s very difficult to get reliable IQ data on a genotyped sample that large, thus we can’t look for IQ genes directly when we don’t know the actual IQs of the people in our genetic studies.
i agree with that but it goes even further in saying that educational levels are better suited in measuring polygenic scores more so than polygenic IQ scores are because polygenic educational scores correlate stronger with IQ data etc. than the polygenic intelligence scores do.
thats what i was finding weird about the situation. i think its because intelligence scores can be confounded due in part of having so many different subtests but educational attainment is a direct source of attribution from having placement in a category if that makes sense!
i agree with that but it goes even further in saying that educational levels are better suited in measuring polygenic scores more so than polygenic IQ scores are because polygenic educational scores correlate stronger with IQ data etc. than the polygenic intelligence scores do.
Only because we have reliable data on education. The polygenic scores for IQ are usually derived from people who took a 2 minutes test.
If Steve Hsu etc could genotype 3 million Americans who took the pre-1995 SAT and if the ETS would release their scores, the polygenic score would correlate around 0.65 with IQ which is much higher than polygenic education scores do
These kids (12yo) took a test for 18 year olds (college entrance exams). Then the kids with top scores of the sample were analysed with GWAS compared to the controls.
This study happedend in 2018 and the sample size in total was less than 10,000 participants genomes.
“A genome-wide association study for extremely high intelligence”
https://www.nature.com/articles/mp2017121
I think it matters how you select the sample for high intelligence to find the polygenic scores of genes because if you don’t know how intelligent a person is you cannot find the genes that add or subtract from IQ.
I know more recent studies have been conducted but I could not find them on my personalized google search algorithm.
makes sense. Why do you think I am jealous of Indians and what makes you defend them.
they’re a no good people. I don’t really mind that they’re parasites but it’s disgusting that they always do very socially disrespectful and evil things.
they’re known as being rapists lunatics etc
pp,
the brain size in the black white IQ gap is caused by genes?
The heritability of brain size is 0.94, so the default hypothesis predicts 97% (square root of 0.94) of the BW brain size gap is genetic:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6871295/
of course it is what else would it be caused by
Indian people are the most autistic. They have no social skills they’re beyond retarded.
Loaded, I think you might be jealous 🙂
of Indian people? At least 95 percent of them are statistically stupider than me if we go by your or Aeolis estimate of my IQ alone.
Anime is stupider than me by a lot which means that he should be jealous of me? Maybe but I don’t think that means that I’d be jealous of a very small minority of Indians more intelligent than me.
most of them have autism the higher iq ones so it makes no sense 4 a neurotypical high IQ person 2 be jealous of a lower iq Indian or an autistic higher iq Indian.
explain your thought process behind this or at least owe me an apology!
You’re jealous that immigrants from another South Asian country are way more successful than immigrants from your home country
Pumpkin, are you a light-skinnded indian?
I”m like you. Half white, half not white.
my brother is half white half Indian. i am not jealous of them being successful. i am just angry that they use success in destroying other people and flouting social norms.
in fact i am ashamed 2 be brown because of all the weird Indian people out there.
they dont have it!
Indians are the most backward people. Even in the United States they are socially unaccepted.
they just control the technology sector and service Jews in that way which would be the only way they’d end up in a western country without extreme hard work!
Jensen’s default hypothesis is false though, so the black-white IQ gap is environmentally caused.
^^Hardcore ideology
If that’s true, then demonstrate that the DH is true.
Or never has to demonstrate that the default hypothesis is true. That’s why it’s the default hypothesis. It’s true by default. The burden is on those who wish to reject it.
Fagan and Holland showed how it’s false. The onus is on hereditarians to demonstrate that it’s true.
You still think that intelligence is only about “knowledge”.
The problem with that is that fluid intelligence is only moderately trainable.
There is a limit to what people can do with fluid intelligence and some have way more than others.
That doesn’t refute my claim.
So Jensen thought 0% of the IQ gap is environment? Interesting. I would have said most of it was genetic but not 100%.
No he thought it was 100% biological, and almost 100% generic. He thought that of all full adult IQ differences in the U.S., not just of blacks and whites but between individuals within each race. The social environment only affects childhood IQ argued Jensen.
Well common sense would say thats not true of everyone. Sometimes the environment has a big role. e.g. nutrition, certain mental activities.
I believe in brain plasticity. But I’m not like RR.
What I’m saying is he thought adult IQ was 100% unaffected by the SOCIAL environment. He agreed BIOLOGICAL environment (nutrition, head injury, prenatal quality) played some role, but only a small role for most people.
Well then hes autistic and wrong. Literally 50% of the population in america and parts of eastern europe and so on were effected by lead in the water.
Maybe Indian average IQ is about 5 points lower just due to pollution and raw sewage everywhere.
Lead in the water is BIOLOGICAl environment which he concedes plays a small part in the U.S.. internationally environmental effects are bigger but he was talking variation WITHIN the U.S.
??? Your verbal IQ is in the toilet. Lead is environmental. Unless you mean pre natal environment maybe.
It’s BIOLOGICAL environment which Jensen concedes plays a small part in U.S. It’s not SOCIAL environment.
You don’t understand the meaning of simple words. Really embarrassing.
I don’t seem to have a problem communicating with anyone else here. You’re simply not intelligent enough to be discussing these topics.
youre a faggot Peeps. keep eating dick you black lesbian!
The way you have chosen to leave indicates low IQ.
keep believing what you want faggot. remember youre A boy who cried wolf.
bye PP.
See ya.
Wouldn’t want to bee ya.
pumpkin,
I see a problem with the sample size.
We do not know where the samples came from whether it was all from a single area of the USA or speed out. Whether from the country side of the cities. The population of the USA in 1980 was 225 million. I am not sure the sample was representative of all white or black people.
I think a meta study needs to be done where we understand what IQ tests actually measure because the norming of many of those tests were done incorrectly. I mean to say those tests in the 60s 70s and 80s have stupid questions on them that were discarded in latter tests so cannot make apples to apple comparisons decade to decade.
Social IQ question: Do you agree or disagree with my analysis that Marianne Williamson should have been a left wing Donald Trump to win the primary?
We already had it with Cenk Uygur and his campaign went nowhere and it would go over even worse from a woman. It worked for Trump because he was already a huge celeb and he’s funny and buffoonish and was not seen as a real threat to the establishment (at least at the time) so they gave him billions of dollars of free media.
Cenk never said 1 thing that was controversial.
Day 1 Marianna should have said Joe Biden was a puppet for the elites with dementia.
Day 2 Marianne should have announced a 50% windfall tax on wall street.
Day 3 Marianne should have announced the end of all subsidies and weapons tranfers to Israel.
You get the gist. She had the charisma to do well but she had conventional policies.
The reason Trump did well isn’t because hes a comedian. Its that his policies are so severe and extreme. The Wall. The ban on muslims. Trade wars. Calling Iraq a con job. All this stuff enraged the neocons to this day.
You’re only half right.
If he enraged the elites so much why did they gave him billions in free media?
It’s like Oprah said “the truth is the reason I was allowed to own my own show is no one thought it would be all that big” Subtext being no one thought a fat black woman would be all that successful.
Trump should say “the truth is the reason I got all that free media is no one thought on an orange buffoon could become the President” LOL
i think social environment has a great effect on intelligence primarily encompassed through a mental health effect. is this plausible?
nope
You just don’t get politics. Trump announced the ban on muslims.
Conventional (autistic) people would say thats political suicide.
I predicted he would jump 20 points minimum in the polls. And i was right.
No there was a lot of cynical pundits who predicted that would help him. Appealing to tribalism is the oldest trick in the Republican playbook. Now trashing the Iraq War in a republican debate a lot of people thought was political suicide. But nothing he did would have mattered if the media didn’t cover him 24/7.
To this day you think the jewish media covered him to promote him LOL. Dumbass. Worst political consultant in the western hemisphere.
Did I say that?
So why DID they cover him? To make money? According to you, Jews don’t care about money. LOL
The media is non profit correct.
So what was their motive for covering Trump 24/7?
Well we can rule out not to make profit and not to promote his ideas dumbass. Hahaha youre so stupid.
What Pill means, but is dumb to conceptualize, is that they are not motivated by materialism. All smart people want money because without it you can’t get almost anything else.
Joe Rogan making fun of Pill:
PP is refusing 2 post my comments because she is a black lesbian.
without me your blog WILL DIE you fucking idiot PP! i cant wait 2 see the glorious look on your face when your stinking Indian ass realizes that no one wants 2 read your shitty comments on things and your blog along with its perspective will be resting six feet!
bitch!
So puppy finally realises hes deranged once he insults him.
Your Theory of Mind is so bad you don’t even know people keep certain thoughts to themselves.
lurker is right!
light skinned japanese are totally fap-able.
the contrast of the black hair and white skin is especially fap-able.
racism: some japanese, korean, and manchu women are crazy hot/fap-able because they are so closely related to europeans GENETICALLY.
it doesn’t even qualify as inter-racial.
i had a pharmacist once who was chinese with freckles. feckles on a chinese?
schwing!
europeans are tall because muh nutrition or because muh genes?
interestingly these are NOT separate.
danes have the lowest level of lactose intolerance on the planet.
dairy stuff is something chinapipo never did.
streetshitters did. so they have no excuse for being midgets. sad.
an example of either:
only all-round retards like professors of human behavior genetics and autistic chinamen like steve shoe cling to the OBVIOUSLY RETARDED theory of “many genes of small effect”.
the level of STUPID you have to be to believe that is steve shoe level STUPID.
human behavior is NOT physics!
deal with it!
What I mean by “explains” is that if you selected a bunch of white Americans to have the same average brain size and polygenic education score as the average black American, they would average roughly the same IQ as the average black American.
Please explain why many genes of small effect is stupid. You’ve made that claim before but I don’t recall if you ever explained it.
can you imagine italians putting up with the kim family for three generations?
FORGET ABOUT IT!
the sexiest woman alive is once again mette frederiksen.
peepee: but men are shallow. all they care about is looks.
mugabe: if i had a choice between mette and zendaya lying on a bed naked waiting for me. i’d go for mette like WAY!
rr: racist!
so Radiolab on the gay gene. i had high hopes. i was disappointed as usual.
the “many genes of small effect” has now become the ideology. even though it’s obviously RETARDED.
this is IDEOLOGY.
human STUPIDITY.
genes can’t be changed + whatever perversion can’t be changed = whatever perversion is caused by genes.
FALSE!
and it’s THE SAME with all psychiatric disorders.
because muh genes yo is also IDEOLOGY in the marxist sense because it lets society off the hook.
mugabe: what if GxE from conception to puberty is really really important to all personality traits for the rest of people’s lives? generally way more important than anything that comes after.
neoliberalism/peepee-tard: shut up racist homophobe deplorable! haven’t you read steve sailer?
those who suffer from trump derangement syndrome and those who have signs in their yards are LOW IQ.
peepee: but they make a lot of money and have multiple degrees from elite schools.
mugabe: correct! by LOW IQ i meant LOW IQ for those who do not have LOW IQs.
I would vote for Rubin over Trump. But thats not to say all trumps positions are terrible or that he has the glorious side effect of enraging neocons.
steve sailer is a jewish sociopath.
he confirms pill’s theory of jews.
Sailer would make a better President than Trump OR Biden or even Lady O.
Hes not jewish dumbass. Wow.
Ok obviously you dont have the social intelligence to tell but heres why they kept trump on tv in 2016.
Basically for the same reason Murdoch’s media replay Biden falling down, rambling, forgetting what hes saying mid sentence, freezing etc.
The thought showing a foaming racist on tv would tarnish him and ruin anyone that said those things. They wanted to make opposing immigration a thought crime.
When it actuallly made him wildly popular, you could literally see the media then try to ‘fact check’ and ‘interperet’ trump’s speeches to explain Jeb Bush or Hilary were the ‘proper’ choices.
Eventually it got to a point where they simply had to cover trump because he was using social media to get around them and if they didn’t add their commentary to his output, people would get the wrong ideas.
So after 9 years of telling us how brilliant Jewish media elites are, you’re now arguing they’re so dumb they didn’t know giving Trump $5 billion in free media would help his campaign, yet they somehow knew that shutting out Ron Paul, Marianne Williamson, Robert F. Kennedy & Cenk Uygur would destroy them.
Here’s the real reasons they gave him $5 billion in free media:
1) He’s ratings gold & the media cares deeply about ratings, especially at a time when people are migrating away from TV to the internet & streaming in droves. Ratings not only make them billions of dollars which they use to buy politicians, but also keeps the audience around for the propaganda they do want
2) although non-WASP elites worried that Trump’s white nationalism could come back to bite them, in the short-term Islamophobia makes it easier to sell neocon wars & anger at minorities and immigrants helps divide and conquer the working class and keeps them from coming after the elites
3) Elites love the fact that Trump removed regulations on business & gave huge tax cuts to the rich
4) Zionist elites loved the fact that Trump ripped up the Iran nuclear deal & moved the U.S. embassy to Jerusalem. They love that he got all the populist voters (who have historically hated Jews) on the side of Israel & against Israel’s Muslim enemies
5) They thought he couldn’t win the presidency, but if he won the Republican nomination, it would make it easy for Hillary to do so.
Because low social IQ, you vastly overestimate how much elites hate Trump. They exaggerate their hatred of him because the AUDIENCE for CNN, MSNBC, & NY times hates him & while many elites really do hate him, others use him as fake opposition. He tricks the dumb masses like you into thinking he’s standing up to the establishment when in reality he’s serving their interests. It behooves the elites to play along & pretend they are scared of him. It’s as fake as professional wrestling, as Mug of Pee would say.
Puppy thinks the media promoted trump lol. What a dumbass. This is what you get with affirmative action. You hire a political consultant with autism.
Pill is so severely autistic he hasn’t showered in 6 months and then blames being fired from 15 affirmative action jobs on mentally illnesses his psychologists charge him into thinking he has as they laugh at his denial of having autism..
Pill is so autistic he thinks they made nine sequels to Friday the 13th because Hollywood doesn’t care about money.
Pill is so autistic, he thinks Trumps became president despite a media blackout:
“Donald Trump Rode $5 Billion in Free Media to the White House
Donald Trump didn’t spend nearly as much on advertising as typical presidential candidates, and he didn’t have to — he relied on billions of dollars in free earned media instead.
Emily StewartNov 20, 2016 1:20 PM EST”
Thats right Puppy. Keep believing the jews promoted trump over Jeb/Hilary.
They’d prefer Hillary over Trump, but many of them don’t mind Trump because he’s super pro-rich, super pro-Israel, super good for ratings, & he mostly directs white nationalist & working class rage against Muslims, blacks, entertainers & immigrants instead of the elites. What’s not for them to like?