Apparently, only a few studies have examined this question and they are not easily available. Because we obtained these, it makes sense to share our results. The datafile is on…
(Broad-strokes modeling of how to think about immigrant performance. Some references are gone because they were written using the Zotero plugin, which I later uninstalled. I have re-added those I…
This was an exchange between researchers that took place in 2006 in the academic journal Intelligence (34). Templer, D. I., & Arikawa, H. (2006). Temperature, skin color, per capita income,…
Chisala has his 3rd installment up: http://www.unz.com/article/closing-the-black-white-iq-gap-debate-part-3/ One idea I had while reading it was that tail effects interact with population ethnic/racial heterogeneity. To show this, I did a simulation…
Van Ijzendoorn, M. H., Juffer, F., & Poelhuis, C. W. K. (2005). Adoption and cognitive development: a meta-analytic comparison of adopted and nonadopted children's IQ and school performance. Psychological bulletin,…
I found this one a long time ago and tweeted it, but apparently forgot to blog it. Odenstad, A., Hjern, A., Lindblad, F., Rasmussen, F., Vinnerljung, B., & Dalen, M.…
It seems that no one has integrated this literature yet. I will take a quick stab at it here. It could be expanded into a proper paper later in case…
https://staffanspersonalityblog.wordpress.com/2013/11/05/openness-to-experience-that-liberal-je-ne-sais-quoi/ Tattoos and piercing. I haven’t found any evidence that this relates to intelligence or even creativity. On the other hand, what underlying factor of openness would it be an…
https://twitter.com/KirkegaardEmil/status/662840970166280192 See first: Some methods for measuring and correcting for spatial autocorrelation Piffer's method Piffer's method to examine the between group heritability of cognitive ability and height uses polygenic scores…
It is often said that polygenic traits are based on tons of causal variants each of which has a very small effect size. What is less often discussed is the…