The ethnic meritocracy in the United Kingdom
Some of my colleagues have a new paper out: Te Nijenhuis, J., Pesta, B. J., & Fuerst, J. G. R. (n.d.). General mental ability testing and adverse impact in the…
Group differences on the Wonderlic short IQ test
I have written a couple of times about how to measure intelligence well and in a short time. Mainly I was interested in which single type of item is best…
The signal and the noise in meta-analysis
OK, it has been written about already by some others, but I also want to talk about this John Protzko pile-on: https://twitter.com/JProtzko/status/1554112968245137408 Here's the original plot in case the tweet…
Brain size and intelligence: 2022
There's a new meta-analysis out for brain size/volume and intelligence: Pietschnig, J., Gerdesmann, D., Zeiler, M., & Voracek, M. (2022). Of differing methods, disputed estimates and discordant interpretations: the meta-analytical…
Male hair loss treatments: I think they work
Being the go-to science guy, I get questions like: so can something be done about my hair loss? The context of this is that I frequently talk about replication crisis,…
Exercise for depression: the evidence does not support this treatment
I've written about this before (in 2014, and in 2017), but due to popular demand, we cover it again. The topic is very important because depression is perhaps the most…
New paper out: The Left-Liberal Skew of Western Media
So it's finally out! Out big meta-analysis of journalist voting patterns. Kirkegaard, E. O. W., Pallesen, J., Elgaard, E., & Carl, N. (2021). The left-liberal skew of Western media. Journal…
Roma/Gypsy IQ meta-analysis: 74
This was presented at London Conference in 2015. Not published so far because the authors "were busy". In that spirit, I shall leave out their names and post the results.…
The sampling problem with meta-analyses of Jensen’s method findings
I have been complaining to colleagues about this one for several months. Of the various criticisms of this method, I don't recall one pointing out this problem. I don't have…
Exercise for depression? Evaluating publication bias in Schuch et al 2016
Wrote a new re-analysis for another meta-analysis of exercise for depression. Found good evidence of publication bias again. Unclear what the effect size really is, but my posterior 95% range…