Share this page!

Enter URL or ID to Unroll

You can paste full URL like: https://x.com/threadreaderapp/status/1644127596119195649
or just the ID like: 1644127596119195649

How to get URL link on X (Twitter) App

  1. On the Twitter thread, click on or icon on the bottom
  2. Click again on or Share Via icon
  3. Click on Copy Link to Tweet
  4. Paste it above and click "Unroll Thread"!
  5. More info at Twitter Help
i/o research Profile picture
@iointelresearch
Apr 15 • 3 tweets • 1 min read • Read on X
New from David's Reich's lab: "In the past ten millennia [in Europe], we find that many hundreds of alleles have been affected by strong directional selection," including those influencing human intelligence.

nature.com/articles/s4158…
"We also document one-standard-deviation changes on the scale of modern variation in combinations of alleles that today predict complex traits. This includes decreases in predicted body fat and schizophrenia, and increases in measures of cognitive performance."
The "[in Europe]" above refers to West Eurasia, which includes areas now included in Europe and West Asia (from which most of the migration to Europe occurred).

• • •

Missing some Tweet in this thread? You can try to force a refresh
　

Keep Current with i/o research

i/o research Profile picture

Stay in touch and get notified when new unrolls are available from this author!

Read all threads

This Thread may be Removed Anytime!

PDF

Twitter may remove this content at anytime! Save it as PDF for later use!

Try unrolling a thread yourself!

how to unroll video
  1. Follow @ThreadReaderApp to mention us!

  2. From a Twitter thread mention us with a keyword "unroll"
@threadreaderapp unroll

Practice here first or read more on our help page!

More from @iointelresearch

i/o research Profile picture
Feb 10
"We compared the estimated Ps between European-ancestry and non-European-ancestry individuals [across 33 traits], and PGS showed no significant differences across ancestries except for the educational attainment (P = 0.006) and IQ PGS (P = 0.0018)."

nature.com/articles/s4146…
The p-values of 0.006 (for educational attainment PGS) and 0.0018 (for IQ PGS) reported in the paper indicate statistically significant differences in the mean polygenic scores between European-ancestry and non-European-ancestry participants in the ABCD study cohort.
Effect sizes are not reported. Without Cohen's d, standardized mean differences, or similar, we cannot assess the practical and substantive magnitude of the differences. They could be small despite statistical significance.
Read 4 tweets
i/o research Profile picture
Jun 9, 2024
(1 of 7)

Some of you may have noticed how little I've tweeted over the past two months. There's a reason for this.

I became aware back in April that a "freelance writer" was planning on doing an "expose" on me that would disclose my identity and professional affiliations.
For what it's worth, I don't think this person actually is a freelance writer, but rather someone who threatens and attacks and publicly discloses the identity of people who are interested in intelligence research.
People who have followed me know that I never inject politics or my personal views into my tweets.

99 percent of my tweets consist of nothing more than brief descriptions of (and links to) studies published in the scientific literature.
Read 7 tweets
i/o research Profile picture
Nov 27, 2023
Since this is being discussed on X today:

"Ashkenazi Jews have the highest average IQ of any ethnic group for which there are reliable data. They score 0.75 to 1.0 standard deviations above the general European average, corresponding to an IQ 112 – 115."

slatestarcodex.com/2017/05/26/the…
"Ashkenazi Jews are just as successful as their tested IQ would predict, and they are hugely overrepresented in occupations and fields with the highest cognitive demands."
"During the 20th century, they made up about 3% of the US population but won 27% of the US Nobel science prizes and 25% of the Turing Awards [in computer science]. They account for more than half of world chess champions."
Read 4 tweets
i/o research Profile picture
Nov 17, 2023
Study finds male-female brain differences and is able to predict "individual IQ scores for males and females separately using whole-brain functional connectivity."

academic.oup.com/cercor/article…
"Robust predictions of intellectual capabilities were achieved across three independent data sets (680 subjects) and two intelligence measurements (IQ and fluid intelligence) using the same model within each gender."
"Interestingly, we found that intelligence of males and females were underpinned by different neurobiological correlates, which are consistent with their respective superiority in cognitive domains (visuospatial vs verbal ability)."
Read 6 tweets
i/o research Profile picture
May 1, 2023
@kareem_carr (Thread Response)

(1)
Some of the assertions made in your thread are outside the scientific mainstream.

Let's begin with your claim that IQ is not an “objective measure of intelligence”...
@kareem_carr (2)

IQ is the most robust major effect in all of psychology, endlessly replicable and with effect sizes unheard in the discipline, up to and beyond 0.90. Its predictive validity across dozens of outcomes is supported in 1000s of published peer-reviewed studies.
@kareem_carr (3)

The percentage of published intelligence scientists who question its validity and utility as a measure of general intelligence is probably in the single digits. Criticism of the construct within the field appears to be mostly limited to activist scientists.
Read 5 tweets
i/o research Profile picture
Apr 29, 2023
I'm suspending my normal prohibition against tweeting links outside published scientific literature to link you to this excellent blog post from psychologist Russell Warne.

I condense his conclusions below.

russellwarne.com/2023/04/29/stu…
"Although it does not take much education for humans to start classifying objects abstractly, many people in the world do not have that level of education, or the education is very low quality."
"Their thinking probably remains grounded in their everyday experience. When these people take a test that solely measures abstract thinking, they perform poorly. This does not make them stupid, nor does it indicate an intellectual disability."
Read 6 tweets

Did Thread Reader help you today?

Support us! We are indie developers!

This site is made by just two indie developers on a laptop doing marketing, support and development! Read more about the story.

Become a Premium Member ($3/month or $30/year) and get exclusive features!

Become Premium

Don't want to be a Premium member but still want to support us?

Make a small donation by buying us coffee ($5) or help with server cost ($10)

Donate via Paypal

Or Donate anonymously using crypto!

Ethereum

0xfe58350B80634f60Fa6Dc149a72b4DFbc17D341E copy

Bitcoin

3ATGMxNzCUFzxpMCHL5sWSt4DVtS8UqXpi copy

Thank you for your support!

Follow Us!

Send Email!

:(