Monthly Archives: December 2012

More old and new Race/IQ/Etc. papers

I added to my assorted but not sorted collection of “old and new Race/IQ/etc. papers.” Readers might be interested in some of the following newer ones: Salter, F. & Harpending, H. Rushton’s theory of ethnic nepotism. Personality and Individual Differences … Continue reading

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Perpetual decline

I have come to notice that the Black-White  gap is in a state of perpetual decline. Every couple of years a report comes out showing that the mean score difference has narrowed and, yet, every time I compute the standardized … Continue reading

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Calculating d and composite scores: a statistical note

When comparing groups, typically, the following formula is used: The difference between the means is divided by the pooled standard deviations. Often, sample sizes are not presented directly. But usually, they can be determined. For example, the NAEP explorer gives … Continue reading

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Falsely reported negatives

(Edit: Corrections were made to this.) In his post, Science for fun and profit, Steve Sailer notes: “One thing that’s interesting is how seldom these kind of data-mined false positives are published regarding The Gap, despite the huge incentives for … Continue reading

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Achievement scores by Parental Race in the HSLS 2009

[If you haven’t guessed, I’m in the process of updating and expanding my The facts that need to be explained post. Unfortunately, I have to do much of the analysis myself (since very few researchers are publishing on this topic) … Continue reading

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More thoughts on differential regression to the mean studies

In a number of previous posts I cited the results of differential regression to the mean studies as evidence against a within group variable factor causal hypothesis of the Black-White intelligence gap. I’ve noted in the comments section of one … Continue reading

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“The War Against Human Nature in the Social Sciences”

Ethnologist Frank Salter has an ongoing series at Quadrant, which some readers might be interested in: The War Against Human Nature in the Social Sciences The War against Human Nature II: Gender Studies (Part 1) The War against Human Nature … Continue reading

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Comments on Gottfredson (2012)

re: Gottfredson, L. S. (in press). Resolute ignorance on race and Rushton, Personality and Individual Differences. Relevant passage: Of all human traits, variation in general intelligence (g) is the functionally most important in modern life. The first question that behavior … Continue reading

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Longitudinal changes in the magnitude of the racial and ethnic gaps in school achievement in the US

Below are the results from the Early Childhood Longitudinal Study Kindergarten Class of 1998-99 (ECLS-K) and Kindergarten Class of 2010-11 (ECLS-K:2011). Scores for general knowledge (for grades k and 1), science (for grades 3, 5 and 8), and both math … Continue reading

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“Genotypic IQ”

Over at Open Borders: The Case, Vipul Naik was discussing the concept of “genotypic IQ.” He notes: My main beef is that I find the concept of “genetic IQ” ill defined and poorly conceived. Yes, there is a heritable component … Continue reading

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