National IQs: measurement invariance studies

A lot of national intelligence criticism focuses on the measurement validity. Are the scores really comparable across countries? Most of the criticism is armchair stuff, or vaguer claims based on smaller studies such as this one: Multiple examples from different societies demonstrating that https://t.co/drJKXid5W0 — Will (@Evolving_Moloch) August 21, 2020 However, there are proper statistical…

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Politically motivated retraction of benign national intelligence study by Clark et al (2020)

Original version: Clark, C. J., Winegard, B. M., Beardslee, J., Baumeister, R. F., & Shariff, A. F. (2020). Declines in Religiosity Predict Increases in Violent Crime—but Not Among Countries With Relatively High Average IQ. Psychological science, 31(2), 170-183. Retraction notice on journal website Andrew Gelman has a write-up from his perspective with woke title: Retraction…

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Predicting aggregate intelligence level from non-cognitive data

Follow-up to my recent post on machine learning psychometrics. Some years ago, I read this paper by Gerhard Meisenberg: Meisenberg, G., & Williams, A. (2008). Are acquiescent and extreme response styles related to low intelligence and education?. Personality and individual differences, 44(7), 1539-1550. Several lines of evidence suggest that acquiescent and extreme response styles are…

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Time preferences and national IQ

Wang, M., Rieger, M. O., & Hens, T. (2016). How time preferences differ: Evidence from 53 countries. Journal of Economic Psychology, 52, 115-135. We present results from the first large-scale international survey on time preference, conducted in 53 countries. All countries exhibit hyperbolic discounting patterns, i.e., the immediate future is discounted more than far future….

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New paper out: book review of Lynn and Becker’s The Intelligence of Nations (2019)

Kirkegaard, E. O. W. (2019). Solid numbers, missed opportunities: Review of The intelligence of nations. Evolutionary Behavioral Sciences. https://doi.org/10.1037/ebs0000181 ResearchGate I was asked to review this new book written by David Becker and Richard Lynn. It’s the long work in progress that James Thompson has blogged about on numerous occasions. This book presents the latest…

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Danish national IQ

Best estimate of Danish-Scandinavian IQ based on recent, large samples is ~103 relative to UK norms. What is the Danish national IQ? If we look at Lynn and Vanhanen 2012, it is estimated at 97.2. If we look at Becker’s re-analysis, it’s given at 98.45 (version 1.2). However, this is based on only two studies,…

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The national IQ of Nepal

There’s an interesting study making the rounds on Twitter: Great new study: In 2002, 1200 Nepalese pregnant women were randomly assigned to receive micronutrient supplements or not. Experimental children had heavier birthweights. Now, at age 12, there was no difference in Intelligence. @Shine_Daizy @marcelleprost https://t.co/ZyCtbJGEMs pic.twitter.com/V1iPbCxiES — John Protzko (@JProtzko) March 8, 2018 Dulal, S.,…

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National chess skill: European culture, intelligence

http://www.unz.com/jthompson/chisalas-last-word/ How far should the net be cast as regards intellectual achievements? I suggest as far and wide as possible, or it will be assumed that some results are being held back. I favour those achievements which are in a “universal language” like maths, science and chess. There will always be some doubt about whether…

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