Analysis of data from 101 countries showed that the more genetically different two populations are, the larger the IQ difference between them tended to be.

The relationship between cross-national genetic distances and IQ-differences
https://www.sciencedirect.com/science/article/abs/pii/S019188691630174X

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#race #intelligence #genetics
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Great Replacement Survey: Even Democrats, Independants Are Now Turning Against Immigration

https://vdare.com/posts/great-replacement-survey-even-democrats-independants-are-now-turning-against-immigration

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#immigration #USA #democrats #independents
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The female pelvic shape and typical childbirth pattern differs among various racial groups.

Therefore, the obstetrician training based on a European pelvis model should be updated, "especially in a multi-ethnic society."

Differences Found in Women's Birth Canals Are Contradicting What Evolutionary Science Told Us

https://www.sciencealert.com/human-birth-canals-contradicts-evolutionary-science-obstetrical-dilemma-hypothesis-neutral-genetic-drift
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#women #birth #canal #race #pelvis
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Sam Harris, not much of a neuroscientist
https://kirkegaard.substack.com/p/sam-harris-not-much-of-a-neuroscientist

When researchers looked at shoppers with low income & education living in rich neighborhoods with more healthy food, their shopping mimicked that of low-income, less educated people in poorer neighborhoods.

Giving the Poor Easy Access to Healthy Food Doesn’t Mean They’ll Buy It
https://archive.ph/unmSY

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#food #poor #income #education
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Almost half of humanities and arts majors regret their choice — and enrollment in those disciplines is shrinking rapidly

The most-regretted (and lowest-paying) college majors
https://archive.ph/2C4Hi

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#education #regret
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New study finds that both self-control and IQ predict academic competence & school-reported grades in a longitudinal model, but IQ is a sig. stronger predictor than self-control.

https://link.springer.com/article/10.1007/s10964-021-01539-4

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#intelligence #SelfControl #competence #grades
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Black five-year old’s have lower IQ scores than do white 5 year old’s even after controlling for family structure, family income, neighborhood income, and direct measures of the quality of the home learning environment.

https://www.jstor.org/stable/1131385?seq=1#page_scan_tab_contents

Some evidence that drug laws work: controlling for earlier levels of use, twins who live in states where marijuana is now legal use marijuana around 20% more than their co-twin living in a non-legal state.

Impacts of recreational cannabis legalization on cannabis use: a longitudinal discordant twin study
https://onlinelibrary.wiley.com/doi/10.1111/add.16016

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#cannabis #marijuana #drug #law #twins
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Confirming results from previous studies, "we found widespread greater variability in males compared with females in cortical surface area and global and subcortical volumes for discrete brain regions."

Sex Differences in Variability of Brain Structure Across the Lifespan
https://academic.oup.com/cercor/article/30/10/5420/5850061?login=false

Other recent studies finding greater male brain variability include:

Sex Differences in the Adult Human Brain: Evidence from 5216 UK Biobank Participants
https://academic.oup.com/cercor/article/28/8/2959/4996558?login=false

Greater male than female variability in regional brain structure across the lifespan
https://www.biorxiv.org/content/10.1101/2020.02.17.952010v1

Brain charts for the human lifespan (see See Fig. 1 (D).)
https://www.nature.com/articles/s41586-022-04554-y

Follow Paolo Shirasi for more
https://mobile.twitter.com/PaoloShirasi

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#SexDiffeerences #men #women #brain
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The IQ gap between the rich and poor "has remained roughly the same for 50 years despite gains in nutrition and the rise of welfarism." "At the current pace of closure, [it] would not be eliminated until the second half of the 22nd Century."

Long-run Trends in the U.S. SES-Achievement Gap
https://www.nber.org/papers/w26764#fromrss

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#intelligence #poor #rich #SES #USA #nutrition #welfare
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Source:

Are Republicans and Conservatives More Likely to Believe Conspiracy Theories?
https://link.springer.com/article/10.1007/s11109-022-09812-3

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#ConspiracyTheory #republicans #conservatives
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Just released: The 2022-2023 College Free Speech Rankings

https://www.thefire.org/just-released-the-2022-2023-college-free-speech-rankings/?utm_source=Twitter&utm_campaign=Newsdesk

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#FreeSpeech #college
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Massive status bias in peer review.

534 reviewers randomized to review the same paper revealing the low status, high status, or neither author. 65% reject low status, 23% reject high status.

Nobel and Novice: Author Prominence Affects Peer Review
https://papers.ssrn.com/sol3/papers.cfm?abstract_id=4190976

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#status #bias #PeerReview
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