Against melatonin
So, some smart people say melatonin is useful for sleep deprivation. I submit that it doesn't do much of anything. Take a random meta-analysis cited in favor: Brzezinski, A., Vangel,…
Replication crisis/decline effect in 1979
I was doing some work on my first name study preparing it for publication and was reading some old papers. McDavid, J. W., & Harari, H. (1966). Stereotyping of names…
Gladwell, the threshold effect for IQ, and Jensen
I don't think Malcolm Gladwell has been debunked hard enough, so here's my contribution towards that goal. For Steven Pinker's take, see here. Gladwell is essentially a story teller, and…
Danish national IQ
Best estimate of Danish-Scandinavian IQ based on recent, large samples is ~103 relative to UK norms. What is the Danish national IQ? If we look at Lynn and Vanhanen 2012,…
Country level indicators of altruism
A traditional approach to studying altruism has been to do some kind of economic game. E.g. seeing how nice people are in ultimatum games. One such study: Oosterbeek, H., Sloof,…
The original texts of the Eyferth study
Often discussed, occasionally cited, but rarely read -- certainly a highly suspicious combo -- I post here the original German language final version (we think): Eyferth, K. (1961). Leistungen verschiedener…
Turkheimer strikes back! (but misses)
Recently, I took a poke at Eric Turkheimer. And now he's ready with a retaliation: https://twitter.com/ent3c/status/1009245615367315456 Eric is trying a guilt by association attack by tying me to Roger Pearson…
Ancestry effects in Brazil: economist approach with person names
I have written a lot about ancestry approaches, generally from a psychometric and genomic angle. However, economists can also play this game. Daniel A. F. Lopes, Geraldo A. Silva Filho,…
Why is Eric Turkheimer so unreasonable about race and intelligence?
Eric Turkheimer is by many counts a good scientist. He has about 11.6k citations on Google Scholar, 6.3 since 2013 (i.e. last 5 years). He is prominent enough that he…
Lewontin’s famous 1972 book chapter
Few people actually read this, which is a shame because the science is interesting for historical purposes, and the fulltext of his famous fallacy is rarely read. I believe this…
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