Differential measurement error and regression
In reviewing our upcoming target article in Mankind Quarterly (edit: now published), Gerhard Meisenberg wrote: “One possibility that you don’t seem to discuss is that there are true and large…
Meta-analysis of behavioral genetic studies of Piagetian cognitive ability
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…
Metrics for quantifying genetic cardinality of a trait
It is common to talk about traits being monogenic or polygenic. We say that Sickle-cell disease is monogenic because its heritable variation among humans can be accounted for by a…
Linguistics paper (for class): Typology and statistics
This may have some interest. Basically, typologists cannot into statistics and it shows. On the other hand, it means there is a large number of low hanging fruit for someone…
General model for immigrant group traits and outcomes
(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…
A better online public platform for discussing scientific papers? A Reddit-based proposal
In a recent post, Steve Hsu writes: It's a shame that we don't have a better online platform (e.g., like Quora or StackOverflow) for discussing scientific papers. This would allow…
Intelligence 34 (2006): Climate and general intelligence, mini special issue
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,…
Ethnic heterogeneity and tail effects
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…
Transracial adoption meta-analysis: Van Ijzendoorn et al (2005)
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,…
Transracial adoption study: Odenstad et al (2008)
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.…
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