Bayesian hereditarianism
In august 2023, Sean Last wrote an important post that didn't receive enough attention. His point was that model comparisons are not correctly (Bayesically) applied in the hereditarianism vs. egalitarianism…
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…
New paper out: The Intelligence Gap between Black and White Survey Workers on the Prolific Platform
This one was overshadowed by the more important paper on economic growth that I wrote about in the prior post. Kirkegaard, E. O. W. (2022). The Intelligence Gap between Black…
Crime measurement and the black-white crime gap
A lot of instant experts have appeared on the black-white crime question. Many of these are somewhat unfamiliar with the quite large literature on the topic. The people who mostly…
Shuey (1966)
Audrey M. Shuey (who even has a barebones Wikipedia page) is one of the most important female early researchers in intelligence research along with Barbara Burks and Leta Hollingworth. Shuey,…
Magic (American) Racism Theory
Aside from the usual Magic Dirt Theory, there is also the Magic (American) Racism Theory. James Flynn explains the conundrum for environmentalists: There is no doubt that high h² [heritability]…
New paper out: Filling in the Gaps: The Association between Intelligence and Both Color and Parent-Reported Ancestry in the National Longitudinal Survey of Youth 1997
We've got a new important paper out in the special issue on race and intelligence in Psych: Hu et al, 2019, Filling in the Gaps: The Association between Intelligence and…
The mysterious PC1 ancestry component
Mehta, C. M., Malins, J. G., Noble, K. G., & Gruen, J. R. (2017). Cortical area and subcortical volume mediate the effect of parental education and adverse experiences on cognitive…
How long do we need affirmative action?
1976, Constance Baker Motley, African American judge: Judicial predictions of reduction or elimination of the RAG through color - based decisions approached the l udicrous. In rendering the decisive vote…
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…