African IQs and mental retardation
This one comes up a lot when we discuss the dire realities of the average intelligence levels seen in Sub-Saharan African countries: If the mean IQs are 70, wouldn't that…
Secular changes in race differences in height: a mystery
Be sure to participate in the 2022 reader survey if you didn't already! Some days ago I came across this study: Rashad, I. (2008). Height, health, and income in the…
Research credibility and group differences
Suppose you did some research that you want to publish. Say you investigated the difference between men on women on some number of traits that are relevant to your current…
The origins of cold winters theory
Richard Lynn famously spent a few decades collecting data on human intelligence around the world. Eventually, he was able to generate world maps of average intelligence levels by nations and…
New paper out: Europeans Have Larger Testes than Sub-Saharan Africans but Lower Testosterone Levels
Together with Ed Dutton and Helmuth Nyborg: Dutton, E., Nyborg, H., & Kirkegaard, E. O. W. (2022). Europeans Have Larger Testes than Sub-Saharan Africans but Lower Testosterone Levels. Mankind Quarterly,…
Wealth gains and IQ gains since Ron Unz’ 2012 post
In 2012, Ron Unz (of Unz.com) wrote a long article with the title Race, IQ, and Wealth published in The American Conservative (follow-up also in 2012 Race/IQ: Irish IQ &…
Woke behavioral geneticists
Book review of The Genetic Lottery: Why DNA Matters for Social Equality by Kathryn Paige Harden. Most people know about the top woke biologists of the past. I am of…
New paper out: County-level USA: No Robust Relationship between Geoclimatic Variables and Cognitive Ability
This one came out in Februrary, so we are a bit behind, but that's because I wanted to time the blogpost with the video. Aaaand the video is online now.…
I,Hypocrite appearance: Race & IQ Debate Prep w/ Emil Kirkegaard
I,Hypocrite runs a fun and popular Twitter account, and apparently, also a Youtube account. I went on the show to talk science of race differences in intelligence since there is…
Editor Matthias Ziegler rejects paper for political reasons, then says science should be neutral
Some colleagues wrote a paper summarizing intelligence/cognitive ability gaps in the United Kingdom based on large samples. Many of these were new results derived from government testing via freedom of…