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Yearly Archives: 2026

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Read more about the article Meta-Analysis of American Race Differences in Intelligence

Meta-Analysis of American Race Differences in Intelligence

  • Post author:Emil O. W. Kirkegaard
  • Post published:30. March 2026
  • Post category:intelligence / IQ / cognitive ability

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.…

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Read more about the article Consequences of racial composition changes in USA 1970-2023

Consequences of racial composition changes in USA 1970-2023

  • Post author:Emil O. W. Kirkegaard
  • Post published:28. March 2026
  • Post category:Criminology/Demographics/Education/Sociology

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…

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Read more about the article Dysgenics for whom?

Dysgenics for whom?

  • Post author:Emil O. W. Kirkegaard
  • Post published:27. March 2026
  • Post category:Demographics/Genetics / behavioral genetics/intelligence / IQ / cognitive ability/Psychiatry

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…

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Read more about the article Motivated reasoning and intelligence

Motivated reasoning and intelligence

  • Post author:Emil O. W. Kirkegaard
  • Post published:26. March 2026
  • Post category:intelligence / IQ / cognitive ability/Political science

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:…

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Read more about the article Words can’t bring me down

Words can’t bring me down

  • Post author:Emil O. W. Kirkegaard
  • Post published:25. March 2026
  • Post category:Political science/Psychiatry/Psychology

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…

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Read more about the article New test site: taketest.xyz

New test site: taketest.xyz

  • Post author:Emil O. W. Kirkegaard
  • Post published:18. March 2026
  • Post category:Differential psychology/psychometrics/Personal

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…

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Read more about the article Penalization for small n problems: case study of Steam games

Penalization for small n problems: case study of Steam games

  • Post author:Emil O. W. Kirkegaard
  • Post published:17. March 2026
  • Post category:Math/Statistics/Media studies

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…

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Read more about the article Steam game ratings don’t show recency effect

Steam game ratings don’t show recency effect

  • Post author:Emil O. W. Kirkegaard
  • Post published:13. March 2026
  • Post category:Media studies

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…

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Read more about the article Newest results on the sex difference in intelligence

Newest results on the sex difference in intelligence

  • Post author:Emil O. W. Kirkegaard
  • Post published:12. March 2026
  • Post category:Uncategorized

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…

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Read more about the article Who makes the most highly rated movies?

Who makes the most highly rated movies?

  • Post author:Emil O. W. Kirkegaard
  • Post published:10. March 2026
  • Post category:Media studies

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…

Continue ReadingWho makes the most highly rated movies?
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