Good science on national IQs
Shae Mclaughlin (SM) has a new blogpost attacking national IQs. I thought it would be suitable to provide the usual rebuttal since I don't see any such post yet. She…
Two new review articles on national IQs
Heiner Rindermann sent me his new review paper: Rindermann, H. (2025). Low cognitive ability estimates in developing countries: A statistical analysis of their credibility. Human Evolution, 40(3–4), 257–284. https://doi.org/10.14673/HE2025341159, Developing countries…
Indian average intelligence: not a mystery
Talking about the current thing on X often results in viral posts: The replies are full of hostility for a variety of reasons, one of them being that Taleb posted…
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…
Worldwide subnational intelligence estimates
It is already known that intelligence causes social status for persons. There's a very large amount of cross-sectional data, and causal conclusions are derived from various family studies, such as…
More COVID vaccines, less excess deaths worldwide
Back in the days of COVID, there was a lot of debate about the efficacy of the vaccines. Unfortunately, most randomized trials were cut-short or too small to look at…
The mirror self-recognition test as an intelligence test among humans
Recently, there has been much talk about national IQs, again. Here's the recent significant writings: Jan. 13. Lyman Stone has a reply to my piece on within vs. between dysgenics.…
German immigrant IQ is about 85 according to new study
Heiner Rindermann strikes back with a new study of immigrants in Germany: Rindermann, H., Klauk, B. & Thompson, J. (2024). Intelligence of refugees in Germany: levels, differences and possible determinants.…
“Surprisingly low IQs in developing countries”, we don’t want to know, thanks
Back in May this year, German intelligence researcher Heiner Rindermann published this study: Rindermann, H. (2024). Surprisingly low results from studies on cognitive ability in developing countries: are the results…
Explaining global variation in internet speed
I saw this on Twitter earlier today: The narrative seemed right, so at first I retweeted. But then I looked closer at the map and realized it couldn't be right.…