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…
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…
Terman’s belief in high heritability of intelligence: unwarranted confidence?
Warne, R. T. (2018). An Evaluation (and Vindication?) of Lewis Terman: What the Father of Gifted Education Can Teach the 21st Century. Gifted Child Quarterly, 0016986218799433. Russell Warne has a…
Intelligence research — persecuted by both Nazis and Communists
Rindermann (Cognitive Capitalism, 2018) writes: Contradicting common beliefs, National Socialists were opposed to intelligence research (Becker, 1938; Jaensch, 1938): in their view, intelligence research would represent a ‘supremacy of Bourgeoisie…
Animal cross-fostering, race and IQ, and the deductivist’s fallacy
I wish to coin a fallacy I've seen a number of times, exemplified in this paper: Kempthorne, O. (1978). A BIOMETRICS INVITED PAPER: Logical, epistemological and statistical aspects of nature-nurture…
Burt, Tizards and hereditarianism
Most readers are probably aware of the fraud accusations against Cyril Burt on account of various claims, but in particular the repeated digits across populations and other numerical irregularities. There's…
Tests of colorism in Pelotas (Brazil) sample for income, wealth and education outcomes
In 2016, a Brazilian PHD student with access to the Brazilian Pelotas dataset was kind enough to run a few regressions for us. We apparently forgot to make the results…
On the East Asian > White advantage on scholastic tests
It's well known that East Asians (Chinese, Japanese, Korean; CJKs) tend to outperform Europeans ('Whites') on cognitive tests. If we look at the standard IQ tests, the advantage is about…
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