Proper embryo selection just landed
Today is an exciting day. First, the HHS announced a more open data policy (in the direction of my suggestions), and second and more importantly, a new company just went…
Video: Davide Piffer and I talk about ancient genomics, polygenic scores and history
The first of many videos for paid subscribers (on Substack). Actually, this first one will be free, and some later ones may also be free (which I will also post…
Odd sibling RDR results: is the problem measurement error in IBD?
You've probably seen the recent Scott Alexander discussion about heritability, with comments from key players and commentators in the field, but if not: Scott Alexander: Missing Heritability: Much More Than…
Intelligence (journal) is dead, long live Intelligence (&CA) journal
As Noah Carl covered at Aporia in December 2024, the old Intelligence journal experienced a hostile takeover by Elsevier and their woke academic friends. As a result, most of the…
Book review: The Intelligence Men: Makers of the I.Q. Controversy (Fancher 1985)
I've been reading old writings recently, which is why I was posting about Terman's views. Some years ago, I heard about the book called The Intelligence Men: Makers of the…
Lewis Terman on human diversity and intelligence in 1922
I've been reading through some old papers and stumbled across an exchange between journalist Walter Lippmann and Lewis Terman in 1922 (original). Unfortunately, I wasn't fast enough to convert my…
Heritability of achievement tests at age 10-14 in Norway’s entire population
Since discussing heritability estimates is all the rage, with Seb Jensen producing a new meta-analysis, and Scott Alexander providing a great review (which was somehow praised by both sides since…
National IQ stereotypes are accurate too
We just published a new article: Jensen, S., & Kirkegaard, E. (2025). Stereotypes of the Intelligence of Nations. Comparative Sociology, 24(2), 272-295. https://doi.org/10.1163/15691330-bja10134 The authors surveyed a nationally representative sample…
Does intelligence have nonlinear effects on political opinions?
Back in March I published this study: Kirkegaard, E. O. W. (2025). Does intelligence have nonlinear effects on political opinions? OpenPsych, 1(1). https://doi.org/10.26775/OP.2025.03.24 We sought to study intelligence’s relationship with…
Military intelligence and racial discrimination
By now, you've probably heard that the US military, and many other militaries around the world, has some kind of intelligence test that they use for admission. The US even…
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