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 writing by someone who disagreed with him. After a long discussion of the interpretation of the Eyferth study of offspring of US soldiers in post-WW2 […]

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 performance in youth. bioRxiv, 160424. Remember “poverty shrinks the brain from birth”? From birth! Fast acting that poverty, actually before birth too. Anyway, Kimberly Noble […]

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 on the High Court decision Grutter vs. Bolling (539 U.S. 2003) and endorsing a continuing legality of quotas, Justice Sandra Day O ’ Connor averred, […]

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 new piece out reviewing the life and criticism of Lewis Terman. While Warne generally defends Terman against criticism, he thinks that Terman went beyond his […]

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 spirit’ (Jaensch, 1938, p. 2); intelligence measurement would be an instrument ‘of Jewry’ to ‘fortify its hegemony’ (p. 3); selection in schools according to intelligence […]

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 data interpretation. Biometrics, 1-23. Abstract: In this paper the nature of the reasoning processes applied to the nature-nurture question is discussed in general and with […]

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 also the case of the supposed missing research assistants/coauthors. I came across a particularly illuminating account, worth sharing here: Jensen, A. R. (1992). “Scientific fraud […]

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 public, but do so now so others can see. I have also previously analyzed some of this data which was later published in an obscure […]

Jensen spent decades trying to convince people that the g factor (general intelligence) is the primary reason why IQ tests predict stuff, not whatever mental abilities the tests appear to measure or what the makers wanted to measure. E.g. as written in: Jensen, A. R. (2002). “Psychometric g: Definition and substantiation“. In R. J. Sternberg […]