Personal productivity in 2025 in numbers
Ah yes, it's time to get back to work after the holidays. So let's start with the yearly recaps. First off is my own productivity numbers (which is what you…
Robert Sternberg returns
Robert Sternberg has licked his wounds and returned to the fray. OK, it was limited to some viral video (2M), but nevertheless. Here's a repost of it: Not really worth…
African beauty
A friend sent me this study yesterday, so let's cover it here: Taddess, B., Zhang, L., & Trejo, S. (2025). Leveraging Genomic Data to Document Within-Race Attractiveness Penalties Among Black…
European women and migrants: are children the solution?
I saw this funny and one might say provocative study: Schahbasi, A., Huber, S., & Fieder, M. (2021). Factors affecting attitudes toward migrants—An evolutionary approach. American Journal of Human Biology,…
Do national IQs predict differently across regions?
Going back to Lyman Stone's tweet: in fact, national IQ’s predictiveness of GDP is often very weak within-region, i.e. within-ancestry-groups. measurement error is obviously a plausible part of this, but…
Admixture in Americas 2.0
We are finally ready to share our big follow-up to the first Admixture in the Americas project from 2016. Fuerst, J., & Kirkegaard, E. O. W. (2025, December 5). Continental…
Does driver’s license training work?
Countries (and subnational divisions within some countries) differ quite a bit in how difficult it is to obtain a driver's license. The requirements here parallel those seen for various kinds…
Verbal tilt model confirmed for political behavior
This paper came out a while ago, but I neglected to comment on it. You may recall 5 years ago I forwarded the verbal tilt model of certain behavioral patterns…
The issue with early interventions for cognitive traits
There are numerous intervention studies aim at improving cognitive traits. While one can aggregate these in ways that give the appearance of impact, when looked at properly they don't really…
Two new review articles on national IQs
Heiner Rindermann sent me his new review paper: Rindermann, H. (2025). Low cognitive ability estimates in developing countries: A statistical analysis of their credibility. Human Evolution, 40(3–4), 257–284. https://doi.org/10.14673/HE2025341159, Developing countries…
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