A partial test of DUF1220 for population differences in intelligence?
You might have heard the DUF1220 hypothesis, it goes something like this: DUF1220 is a copy number variant poorly tagged by arrays, and thus would not be captured well by…
FAQ for Dunkel et al 2019 Ashkenazim polygenic score for intelligence
Dunkel, C. S., Woodley of Menie, M. A., Pallesen, J., & Kirkegaard, E. O. (2019). Polygenic scores mediate the Jewish phenotypic advantage in educational attainment and cognitive ability compared with…
What you can’t say: genetic group difference edition
Paul Graham's 2004 essay What you can't say had a big influence on me and remains my favorite essay. In he argued essentially that popular morality shows fashion tendencies i.e.…
The WORDSUM question
I tweeted about this already, but I'm dumping some notes here for future reference. The Wordsum is a 10 word vocabulary test that's been used for decades as a brief…
Environmentalists like admixture analysis too (until they don’t)
See previous post about quotes from the medical genetics and physical anthropology literature on admixture analysis and the causal interpretation. There's quite a few older admixture studies that examined relationships…
It works in practice, but does it work in (my) theory?
There's a certain type of person that doesn't produce any empirical contribution to "Reducing the heredity-environment uncertainty". Instead, they contribute various theoretical arguments which they take to undermine the empirical…
Writings on ethics and politics of race and intelligence research
Sometimes people argue that one shouldn't even be allowed to research race and intelligence causes. I'm sometimes asked directly why I choose to study this topic. Well, I could outline…
Jelte Wicherts’ lost stereotype threat study for African Americans
In the program for the 2009 ISIR conference, we find something interesting: In Jelte's CV from 2011, we see it too: It's also there in the 2012 version, but it…
Asian Eyferth?
I am reading over James Flynn's book on Arthur Jensen, Race and IQ from 1980. It's very interesting from a historical perspective, and probably the best description of Jensen's views…
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…
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