The general disease (“d”) factor and mutational load
Last year, this study was published: Brandt, V., Zhang, Y., Carr, H., Golm, D., Correll, C. U., Arrondo, G., ... & Cortese, S. (2023). First evidence of a general disease…
The ethnic meritocracy in the United Kingdom
Some of my colleagues have a new paper out: Te Nijenhuis, J., Pesta, B. J., & Fuerst, J. G. R. (n.d.). General mental ability testing and adverse impact in the…
The value of intelligence
There are many studies that report correlations between intelligence -- however measured -- and economic outcomes, mainly (self-reported) income. This is however somewhat abstract since correlations are unitless. They don't…
It doesn’t matter whether refugees are in the same classroom
Back in 2018, I wrote about classroom separation studies. It's one clever way to use the already existing twin data to examine specific environmental causes. Many people will claim that…
The first admixture mapping study for intelligence
There's a new study out of note: Xia, R., Jian, X., Rodrigue, A. L., Bressler, J., Boerwinkle, E., Cui, B., ... & Fornage, M. (2024). Admixture mapping of cognitive function…
Large environmental effects on hand grip strength internationally
Hand grip strength is a pretty interesting measurement. Fast to do, reliable, and seemingly irrelevant to most of modern life devoid of physical labor. But it turns out to be…
Wikipedia’s political bias demonstrated by sentiment analysis
The great David Rozado has a new study out on the politics of Wikipedia: Is Wikipedia Politically Biased?. He downloaded the English Wikipedia database, and analyzed whether the articles covering…
What do genomic principal components mean?
There's a new study out making the rounds, but first I want to divert and ask: Who invented admixture regression? Here I mean the analysis where admixture (ancestry) estimates of…
The gender equality ‘paradox’ and genetics
There's a number of studies that find that egalitarian cultural values correlates with larger not smaller actual measured sex differences. These are the first major studies using large international surveys:…
Italian fascists were big on trains actually
There's a slogan about Mussolini that, setting aside his faults, he did at least make the trains run on time. Given this one positive statement about Italian fascism, one will…
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