So our new meta-analysis of the American race gaps in IQ is published! Kirkegaard, E. & Jensen, S. (2025). Meta-Analysis of American Race Differences in Intelligence. Mankind Quarterly, 66(2), 290-300.…
Some years ago, I gave a good idea of a study to a friend, and he did it. But then he just never published his study anywhere, it's just sitting…
Some time ago, we published studies showing that the negative correlation between intelligence and fertility varies by other factors. Specifically, we found that it varies by religiousness and conservatism, in…
Years ago, a very flashy finding by Kahan and colleagues (2017) got popular (1200+ citations). It goes like this, you give people some matrices of fake study data like these:…
At least, that's a philosophy of life that some people subscribe to. Others think that words are sort of magic and can hurt you. Even if they are general statements…
Using Claude code I am realizing some projects that were always waiting for a sudden burst of manic energy. These projects now only take some hours of chatting and revising…
For many kinds of ranking websites, users are naturally going to be interested in the leaderboard or top list, the best of the best. This is the same thing for…
Due to a data error, some of these findings are not entirely true. See next post. Previously, I showed that IMDB movie ratings are inflated for recent movies. I speculated this…
Richard Lynn noted a 'paradox' or incongruency many years ago (1994): A paradox concerning sex differences in intelligence and brain size has recently been noted by Ankney (1992) and Rushton…
Working with the IMDB data, we can also have another look at who makes the best movies. I previously examined this using the best foreign film category from the American…