Nisbett’s 2009 book on intelligence, Intelligence and how to get it, is a goldmine of stupid claims that one can quote-mine for introduction and discussion sections of papers. For instance, Nisbett tries to argue that brain size is not causal for intelligence! He writes: The correlation between cranial capacity and IQ is probably about .30-.40 […]

@bechhof Might as well ask a couple of knowledgable people: @rcafdm @KirkegaardEmil is there evidence the BW IQ gap has closed since 90s? — Elan (@HoustonEuler) March 4, 2017 There’s been some talk about whether the SIRE (self-identified race/ethnicity) gaps are closing and if so how much and when they did that. The matter is […]

Back in January, Steve Hsu did an interview with Daphne Martschenko who is a phd candidate at Cambridge in education. She’s basically doing science journalism on behavioral genetics as far as I can tell. Now there’s a new interview up. I have some comments to it because Steve was a little too nice. Bias from […]

So, I posted this: Abstract We used data from the PING study (n≈1200) to examine the relationship between cognitive ability, socioeconomic outcomes and genomic racial ancestry. We found that when genomic ancestry was not included in models, self-reported race/ethnicity (SIRE) was a useful predictor of cognitive ability/S, but when genomic ancestry was included, SIRE lost […]

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 […]

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 […]

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 […]