African IQs using only age heaping data
Age heaping is a fascinating method. I blogged about it back in 2015, hoping that someone would take up the idea of fusing this literature from historical economics with modern…
Buj (1981) is probably fraudulent and shouldn’t be used
There's an odd old paper sometimes mentioned and even worse, used for calculations: Buj, Vinko. (1981). Average IQ values in various European countries. Personality and Individual Differences, 2(2), 168-169. Paper…
The Mensa fallacy
Back in 2015 at ISIR, a researcher gave a presentation about mental illness and intelligence, reporting it was elevated at high intelligence levels, along with all kinds of other issues.…
13/52 is out, 3/18 is in
The American Jewish hate organization ADL famously has a funny list of forbidden words and numbers. One recent addition to their list of 'hate symbols' is 13/52. For the uninitiated,…
African IQs without African IQs: it’s complicated
Noah Carl has recently written about the African IQs debate, basically defending the usual numbers. Aside from arguing that the data are good enough to use, though obviously not perfect,…
The signal and the noise in meta-analysis
OK, it has been written about already by some others, but I also want to talk about this John Protzko pile-on: https://twitter.com/JProtzko/status/1554112968245137408 Here's the original plot in case the tweet…
R for machine learning and other stuff
One of the best things about R is that there is a never-ending stream of new short textbooks being written. Most of these are now written using the neat bookdown…
Book review: At Our Wits’ End (Ed Dutton, Michael Woodley, 2018)
I try to read many different kinds of books each year. Outside of my own fields, I try to consume high quality popular science, but mainly read academic books within…
“public policy never necessarily follows from scientific findings”, yes and no
I am currently reading Bryan Caplan's new book collection of old blogposts in book format. One of them was pretty interesting: Behaviorial Geneticists versus Policy Implications from 2009. He quotes…
Why can’t we prevent or cure hangovers?
There is a nice theory in economics about why capitalism is better than socialism. It goes like this. Under socialism, central planners try to estimate what the public wants and…
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