Massive Danish sibling study confirms Charles Murray’s findings

Massive sibling study just dropped, and was also presented at ISIR 2019. Hegelund, E. R., Flensborg-Madsen, T., Dammeyer, J., Mortensen, L. H., & Mortensen, E. L. (2019). The influence of familial factors on the association between IQ and educational and occupational achievement: A sibling approach. Personality and Individual Differences, 149, 100-107. The present register-based study…

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ISIR 2019 talk: Machine learning psychometrics

Machine learning psychometrics: Improved cognitive ability validity from supervised training on item level data Andrew Cutler gave the talk since I was unable to attend. Slides are here: docs.google.com/presentation/d/1xxfYTWP2R0ZFvbI24sR1jVyFC_qN_Lw85782zE5Q2Jo/edit#slide=id.p Live tweeted by Russell Warne: Last speaker of the day is Andrew Cutler (Boston U.). He's talking about "Machine Learning Psychometrics."#ISIR2019 #psychometrics #psychology — Russell T….

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Article out: First Names, Cognitive Ability and Social Status in Denmark

Kirkegaard, E. O. W. (2019). First Names, Cognitive Ability and Social Status in Denmark. Mankind Quarterly, 59(4). Retrieved from mankindquarterly.org/archive/issue/59-4/5 It is well established that general intelligence varies in the population and is causal for variation in later life outcomes, in particular for social status and education. We linked IQ-test scores from the Danish draft…

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New paper out: Filling in the Gaps: The Association between Intelligence and Both Color and Parent-Reported Ancestry in the National Longitudinal Survey of Youth 1997

We’ve got a new important paper out in the special issue on race and intelligence in Psych: Hu et al, 2019, Filling in the Gaps: The Association between Intelligence and Both Color and Parent-Reported Ancestry in the National Longitudinal Survey of Youth 1997, Psych Little research has dealt with intragroup ancestry-related differences in intelligence in…

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Immigrant IQ gains by generation: evidence from PIAAC

Thanks to Chet Robie for sending me his study. There’s been quite a bit of research on immigrant IQs. From within our network, Heiner Rindermann and James Thompson published a long analysis of scholastic achievement data: Rindermann, H., & Thompson, J. (2016). The cognitive competences of immigrant and native students across the world: An analysis…

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FAQ for “Cognitive ability and political preferences in Denmark” Kirkegaard, Bjerrekær, Carl (2017)

Kirkegaard, E. O. W., Bjerrekær, J. D., & Carl, N. (2017). Cognitive ability and political preferences in Denmark. Open Quantitative Sociology & Political Science, 1(1). Various critics of Noah Carl are being asked to produce something that shows they have read and understand his research, and they appear to be struggling. In an attempt to…

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On Nazism and Jews

This sort of thing should not be necessary. However, due to long time mentally ill online stalker Oliver D. Smith (see here), and various people who repeat his lies and distortions, writing something like this has become necessary. At various times, my colleagues are accused of being connected to me, “well-known neo-Nazi” (as one random…

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