Hereditarian predictions
Putting these in writing in a single place for ease of reference. Unfortunately, no one wrote down all these predictions some years ago to show they really were predictions, but…
Quantitative genetic and natural selection: 2018-2020 studies
There are many studies that look at signs for selection using large genomic datasets. This post provides a selective summary of such studies from 2018 to now, so very recent…
Chanda Chisala did not come up with the UK race gaps argument
Many people seem to have this impression. These arguments go back more than 10 years. This post quotes various UK newspaper articles going back to 2006: Underperformance of Poor White…
Smart fraction theory: literature collection
I am finishing up a large study on smart fraction theory (intellectual classes model). To this end, I reviewed all the empirical papers on the topic, and some historical ones.…
Macroeconomics and intelligence: a collection
See prior post on national IQs and who you can't cite. Economists and intelligence researchers don't generally talk: Test scores, on the other hand, offer direct measures of a variety…
Motivation and IQ scores
Der er is a famous meta-analysis showing that motivation affects IQ scores to a substantial degree: Duckworth, A. L., Quinn, P. D., Lynam, D. R., Loeber, R., & Stouthamer-Loeber, M.…
IQ testing in America: not banned
See also this post by greyenlightenment. There is a widespread (e.g. 1, 2, 3) but false belief that the 1970s supreme court case Griggs v. Duke Power Co., 401 U.S.…
National IQs: measurement invariance studies
A lot of national intelligence criticism focuses on the measurement validity. Are the scores really comparable across countries? Most of the criticism is armchair stuff, or vaguer claims based on…
Educational socialism
Some people think that human differences are just a matter of throwing enough money at the problem. Naturally, then, they always advocate for more educational spending whenever inconvenient gaps are…
Birth order effects and achievement: autism-hormonal model
Back in 2018, Scott Alexander published a troll post: Fight Me, Psychologists: Birth Order Effects Exist And Are Very Strong. From casual observation of people in rationalist community, and other…
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