Whose responsibility is it anyway?
In our third installment of our new work in this issue of Mankind Quarterly, we're branching off into political science: Jensen, S., & Kirkegaard, E. O. W. (2023). Who Believes…
Can you only talk to people within X IQ of your own?
There is this claim sometimes seen when discussing highly gifted people. One interested reader emailed me to ask where it was that Arthur Jensen made this claim: Anyway, what I…
Autistic children attend a course delivered by a specialised teacher Caroline Berge (L) at the College du Parc in Aulnay-sous-Bois, northeast of Paris on October 9, 2019. (Photo by Christophe ARCHAMBAULT / AFP) (Photo by CHRISTOPHE ARCHAMBAULT/AFP via Getty Images)
Autism diagnoses are rising, yes, but autism, probably not
We can read in many outlets that the reason autism is increasing in prevalence is that clinicians are becoming more aware of it. The idea being that autism was already…
New study: Intelligence and Group Differences in Preference for Breasts over Buttocks
George Francis and I have a new exciting study out, the formal and finalized version of George Francis' 2022 blogpost: Francis, G., & Kirkegaard, E. O. W. (2023). Intelligence and…
New study out: Systemic Racism Does Not Explain Variation in Race Gaps on Cognitive Tests
The new issue of Mankind Quarterly just came out. It appears I have no less than 6 pieces in this, so let's get started. Kirkegaard, E. O. W. (2023). Systemic…
Money and crime: the relationship that wasn’t
There must be 10,000s of studies and news articles reporting findings that wealth or income is negatively related to crime. In other words, poverty causes crime. The popular theory being…
Measurement error and group differences explained
I have often talked about how measurement error impacts correlations between two variables. Here we are talking about classical measurement error, which is theoretically understood as adding a normally distributed…
Heritability, within and between groups
There is a new preprint that's making the rounds on Twitter: Schraiber, J. G., & Edge, M. D. (2023). Heritability within groups is uninformative about differences among groups: cases from…
What if somewhere, someone used to look at their polygenic scores?
Undark magazine has a new piece out where a journalist expresses concern about people looking at their own DNA results: From a Fledgling Genetic Science, A Murky Market for Prediction.…
National “learning-adjusted years of schooling”
We've recently seen national "basic skills" and Team Economist is now back with another one: National "learning-adjusted years of schooling". We might say that national intelligence enjoys a paradoxical popularity.…
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