I don’t think Malcolm Gladwell has been debunked hard enough, so here’s my contribution towards that goal. For Steven Pinker’s take, see here. Gladwell is essentially a story teller, and while he doesn’t directly make stuff up, as far as we know (unlike e.g. Jonah Lehrer), he plays fast and loose with sources. Some years […]

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, […]

Often discussed, occasionally cited, but rarely read — certainly a highly suspicious combo — I post here the original German language final version (we think): Eyferth, K. (1961). Leistungen verschiedener Gruppen von Besatzungskindern in Hamburg-Wechsler Intelligenztest für Kinder (HAWIK). Archiv für die gesamte Psychologie, 113, 224-241. Eyferth, K. (1959). Eine Untersuchung der Neger-Mischlingskinder in Westdeutschland. […]

I have written a lot about ancestry approaches, generally from a psychometric and genomic angle. However, economists can also play this game. Daniel A. F. Lopes, Geraldo A. Silva Filho, and Leonardo Monasterio. Culture, Institutions and School Achievement in Brazil This paper estimates the impact of culture on the academic performance of Brazilian students in […]

Eric Turkheimer is by many counts a good scientist. He has about 11.6k citations on Google Scholar, 6.3 since 2013 (i.e. last 5 years). He is prominent enough that he has a Wikipedia page, is a full professor at a University of Virginia (world rank ~150), and has published about 126 articles (according to his […]

This page on Wikipedia claims rather surprisingly that: This list comprises laureates of the Nobel Prize who self-identified as atheist, agnostic, freethinker or otherwise nonreligious at some point in their lives.[2] Many of these laureates were identified with a religion earlier in life. By one estimate, between 1901-2000 about 10.5% of all laureates, and 35% […]

This year (2018) Robert Sternberg is slated to give a distinguished contributor interview at the ISIR meeting to be held in Edinburgh. There’s already tons of material on his behavior: Extreme self-citations: replicationindex.wordpress.com/2018/04/22/robert-sternbergs-rise-to-fame/ Extreme text recycling (self-plagiarism): steamtraen.blogspot.fr/2018/04/some-instances-of-apparent-duplicate.html Editorial role abuse: www.insidehighered.com/news/2018/04/30/prominent-psychologist-resigns-journal-editor-over-allegations-over-self-citation and more However, here I want to point out an additional angle. Sternberg […]

Rindermann, H. (2018). Cognitive capitalism: human capital and the wellbeing of nations. Cambridge, United Kingdom ; New York, NY: University Printing House. Heiner was kind enough to send me a reviewer’s (paper) copy. Unfortunately, I lack the time to write up a formal book review, and so this blogpost will have to do. James Thompson already […]

Doing a lot of background reading on animal ecology, I found this review paper: Lefebvre, L. (2013). Brains, innovations, tools and cultural transmission in birds, non-human primates, and fossil hominins. Frontiers in human neuroscience, 7, 245. Recent work on birds and non-human primates has shown that taxonomic differences in field measures of innovation, tool use […]

Miron Zuckerman is updating his meta-analysis of the religion and intelligence relationship, and asked me to compute some extra analyses of the OKCupid dataset. Results: rpubs.com/EmilOWK/intell_religion_OKCupid Main findings Cognitive ability is independent cause of the usual demographics. Distribution of cognitive ability by religious stance x seriousness. Error bars = 95% confidence intervals. Gays more religious […]