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. doi.org/10.1037/ebs0000181 ResearchGate I was asked to review this book 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 revision of…

Continue Reading

National IQs from GRE, GMAT, TOEFL et al

Back in January, we published a paper showing that the obvious explanation of variation is in GRE scores by nationality/origin fits the data well. Pesta, B. J., Fuerst, J., Kirkegaard, E. O., & Papaleo, B. (2019). Does intelligence explain national score variance on graduate admissions exams?. Intelligence, 73, 8-15. Mean scores on English-based graduate admissions…

Continue Reading

Arab engineer IQ?

As others have pointed out many times (recently Richwine 2019), one cannot just use identical thresholds of educational attainment to select for identical levels of human capital (broadly conceptualized) among sending immigrant countries. Example of this was that Heiner Rindermann mentioned in an interview (in German) that: Selbst in einer Elitegruppe, Ingenieurstudenten aus den Golfstaaten,…

Continue Reading

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…

Continue Reading

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….

Continue Reading

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…

Continue Reading

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…

Continue Reading

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…

Continue Reading

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…

Continue Reading