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Clear Language, Clear Mind
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Emil O. W. Kirkegaard blog

A theory of Ashkenazi genius: intelligence and mental illness

  • Post author:Emil O. W. Kirkegaard
  • Post published:11. November 2022
  • Post category:Genetics / behavioral genetics/intelligence / IQ / cognitive ability/Psychiatry

I want to put together a theory to explain a putative phenomenon: Ashkenazi Jews have more geniuses relative to non-Jewish Europeans (gentiles) than one would expect based on their average…

Continue ReadingA theory of Ashkenazi genius: intelligence and mental illness
Read more about the article Racial diversity: does it matter? How do we know?

Racial diversity: does it matter? How do we know?

  • Post author:Emil O. W. Kirkegaard
  • Post published:9. November 2022
  • Post category:Criminology/intelligence / IQ / cognitive ability/Sociology

A lot of people on the right are concerned about the negative effects of ethnic and religious diversity. Sometimes, they produce plots like this one: The plot shows racial homogeneity…

Continue ReadingRacial diversity: does it matter? How do we know?
Read more about the article Reader survey 2022 results

Reader survey 2022 results

  • Post author:Emil O. W. Kirkegaard
  • Post published:7. November 2022
  • Post category:intelligence / IQ / cognitive ability/Psychology

So let's see those survey results from the 2022 reader survey. Some of them are funny. There were a total of 318 takers, of which 125 were complete (answered every…

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Read more about the article What’s the right dose of democracy?

What’s the right dose of democracy?

  • Post author:Emil O. W. Kirkegaard
  • Post published:4. November 2022
  • Post category:Book review/Economics/Immigration

If you haven't done so already, take the reader survey here! In medicine, there's the occasional discussion of the dose response function of some drug. People wisely assume that it…

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Read more about the article Does vaping shrink your balls?

Does vaping shrink your balls?

  • Post author:Emil O. W. Kirkegaard
  • Post published:3. November 2022
  • Post category:Medicine

Some time ago, someone sent me this: https://twitter.com/AlpacaAurelius/status/1583506701726064651 I know, generic ancient Rome/Greek right-wing back-to-nature type stuff, even hates on deodorants: https://twitter.com/AlpacaAurelius/status/1587965330856493056 "Alright Emil, but these are cheap shots. What…

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Read more about the article African IQs and mental retardation

African IQs and mental retardation

  • Post author:Emil O. W. Kirkegaard
  • Post published:27. October 2022
  • Post category:intelligence / IQ / cognitive ability/Psychiatry

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…

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Read more about the article Secular changes in race differences in height: a mystery

Secular changes in race differences in height: a mystery

  • Post author:Emil O. W. Kirkegaard
  • Post published:24. October 2022
  • Post category:Genetics / behavioral genetics/intelligence / IQ / cognitive ability

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…

Continue ReadingSecular changes in race differences in height: a mystery

Substack 1st anniversary, statistics, reader survey, and a new video

  • Post author:Emil O. W. Kirkegaard
  • Post published:23. October 2022
  • Post category:Economics/Meta/Personal

My Substack is growing a lot faster than I anticipated, and we've hit 2000 2100. It took about one year, as my first post was 11th October 2021: Paid subscribers…

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Read more about the article Variance explained is mostly bad

Variance explained is mostly bad

  • Post author:Emil O. W. Kirkegaard
  • Post published:21. October 2022
  • Post category:Genetics / behavioral genetics/Math/Statistics

Reporting the proportion of variance explained by some statistical model is ubiquitous. However, just like p-values, it is a misleading metric. I'll try explain why it is used, and why…

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Read more about the article National intelli… basic skills!

National intelli… basic skills!

  • Post author:Emil O. W. Kirkegaard
  • Post published:20. October 2022
  • Post category:intelligence / IQ / cognitive ability

Ludger Woessmann tells us about some dire facts: https://twitter.com/Woessmann/status/1581884461007785986 It's about their new 75 page working paper which they summarize thus: How far is the world away from ensuring that…

Continue ReadingNational intelli… basic skills!
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