Some of the talks from ISIR 2016 in Saint Petersburg are now online. In particular, I enjoyed Detterman’s talk, but of course I think he is too pessimistic about reproductive genetics. All the talks were recorded, but only the long ones with the most famous people are published so far, so you will have to […]


rpubs.com/EmilOWK/208757 Analysis of the data collected so far, presented side by side with R code. It will be expanded into a proper paper and submitted to OQSPS soonish. Soonish here meaning when Noah gets around to do it! Due to the surprising results, we should probably do a follow-up replication using new subjects. These results […]


One of the things that bother me with the current research on gender differences in personality is the reference group approach problem. Researchers ask questions that require participants to make comparisons between themselves and some implicit group. Gerhard Meisenberg pointed out the problem with this approach for cross-cultural research: A potentially remediable source of low […]

In a not so well written paper (that we should update to be better presented), John Fuerst and I previously used two hypotheses using the National Longitudinal Survey of Freshman dataset: Spatial transferability: when people move, they tend to keep their psychological traits and culture. Generational transferability: when people have children, their children tend to […]

I was recently asked to suggest introductory reviewing materials for bright laymen (see also my previous post). I ended up giving the following recommendations: – Intelligence: A very short introduction (2001, by Deary, very mainstream researcher). 132 pages. Libgen – Intelligence: All that matters. 2015. Ritchie (young, mainstream researcher). 160 pages. Libgen Bit more technical, […]

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 are able to drop out if one annoys them too much. In both cases it is important to use brief measures. Still, when one uses […]

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 Cognitive Ability and Violent Crime Caused by Family-Level Confounders? We linked longitudinal Swedish total population registers to study the association of general cognitive ability (intelligence) […]

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 axes (á la this test). He did this in two datasets so far, covering the UK and the US: Verbal intelligence is correlated with socially […]

Normally, testing colorism or other causal models of why human racial traits have nonzero relationships to socioeconomic outcomes requires that one has the following data: Measure of racial ancestry Measures of racial appearance Measures of socioeconomic outcomes such as income or educational attainment Path model wise, one can think of it this way: Discrimination models […]