Administration time and reliability in measurement
For some research designs, one pays the participants by the amount of time they spend on the task (like regular work). For other designs where one does not, usually participants…
Predictions for an individual-level general crime factor study using Swedish register data
There is a lot of research on the link between crime and cognitive ability. (For criminal outcomes, see the problems in my previous post.) E.g. Is the Association between General…
Personal freedom and cognitive ability: OKCupid dataset replication
Noah Carl has been investigating the relationship between cognitive ability and political opinions aside from the usual confused 1-axis left-right model. Specifically, looking at the economic freedom and personal freedom…
Crime/violence, gender, sexual orientation, cognitive ability
In a recent paper, Beaver et al looked at the relationships between crime, gender and sexual orientation: This study examined the association between sexual orientation and nonviolent and violent delinquency…
Cognitive dysgenics in the OKCupid dataset: a few simple analyses
OKCupid dataset (not public right now, contact me if you want the password). Draft paper: https://osf.io/p9ixw/ I looked at whether there was evidence for cognitive dysgenics in the OKCupid dataset.…
US state IQs cannot be estimated from OKCupid data
In the interest of publishing null findings: I tried estimating US state IQs from the mean cognitive ability for users in the OKCupid dataset. However, this did not work out.…
New papers out! Admixture in the Americas
I forgot to post this blog post at the time of publication as I usually do. However, here it is. As explored in some previous posts, John Fuerst and I…
Comments on Gwern’s “Embryo selection for intelligence”
Link: http://www.gwern.net/Embryo%20selection Embryo selection an add-on to IVF [his summary]: harvest x eggs fertilize them and create x embryos culture the embryos to either cleavage (2-4 days) or blastocyst (5-6…
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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