There is no IQ threshold effect, also not for income
We've been over this before, but it's a perennial topic. People like to claim that beyond a certain level of intelligence, additional intelligence doesn't help to get X, where X…
Conservatives aren’t stupid*
Richard Hanania likes to tell us: It’s why people say I’m a conservative despite half my writing being about how conservatives are immoral, low IQ, and generally inferior to liberals.…
New paper out: Intelligence Really Does Predict Job Performance: A Long-Needed Reply to Richardson and Norgate
Zimmer, P., & Kirkegaard, E. O. W. (2023). Intelligence Really Does Predict Job Performance: A Long-Needed Reply to Richardson and Norgate. OpenPsych. https://doi.org/10.26775/op.2023.02.12 One commonly studied aspect of the importance…
Incompetent police
We have yet another high profile case of a police beating in the USA, so it seems useful to talk about why we can't have nice things. First, let's step…
Are fat people dumb?
There's a stereotype that fat people are lazy, less intelligent, and of course, they are widely considered unattractive in the west in modern times. But is this stereotype true? Well,…
Rationality and the fair sex
Rationality is great. It's what separates humans from other species to a very large extent. There's not one but two philosophical movements named after this (rationalism of Descartes et al,…
High heritability does mean that social interventions likely won’t work well
The scientific literature is full of claims like this one (Paige Harden 2021): This hereditarian pessimism about the possibility of social change, however, is based on a fundamental misunderstanding of…
The thick end of The Bell Curve
Adrian Wooldridge is currently popular with his book The Aristocracy of Talent: How Meritocracy Made the Modern World (2021). I read the book a while ago, but forgot to do…
Smart fraction theory vindicated
In the last days of 2022, Noah Carl and I had a new paper out: Kirkegaard, E. O. W., & Carl, N. (2022). Smart Fraction Theory: A Comprehensive Re-evaluation. Comparative…
Cold winters theory: a summary of the evidence and replies to objections
Cold winters theory gets at bad name, even from fellow hereditarians. In fact, the article about it was deleted from Wikipedia too. In my opinion that's because they are not…
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