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IQ Regression to the Mean : the Genetic Prediction Vindicated
The IQ differences between blacks and whites lead to differences in sibling regression to the mean. The races regress to different means. Criticisms were made about the hereditarian interpretation of...
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A Brief Comment on Hu (2013, April, 18): The Meaning of Differential Regression
Number 4 in the social science’s top 10 list of “grand challenge questions that are both foundational and transformative” (Giles, 2010) is: “How do we reduce the ‘skill gap’ between black and white...
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A few New Analyses
Hu (2013, September, 5; 2013, July, 5; 2013, August, 18) has raised some interesting points. I will comment on a few of them here and present several new analyses. Cultural Loading, Heritability, and...
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An Analysis of the NLSY79 and NLSY97 Full Sibling Correlations by Race
In his classic work, Educability and Group Differences, Arthur Jensen presented a number of lines of evidence in defense of his thesis that the Negro-White difference in psychometric intelligence had a...
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Measurement Error, Regression to the Mean, and Group Differences
Regression to the mean, RTM for short, is a statistical phenomenon which occurs when a variable that is in some sense unreliable or unstable is measured on two different occasions. Another way to put...
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