Reference group effects, shifting standards
Probably most social science is done using data that are based on self-report. Thus, they are crucially dependent on assumptions that self-report data reflect objective reality. There are some large…
New paper out: The Negative Religiousness-IQ Nexus is a Jensen Effect on Individual-Level Data: A Refutation of Dutton et al.’s ‘The Myth of the Stupid Believer’
Dutton, E., & Kirkegaard, E. O. W. (2021). The Negative Religiousness-IQ Nexus is a Jensen Effect on Individual-Level Data: A Refutation of Dutton et al.’s ‘The Myth of the Stupid…
That 2005 study on IQ and marriage by sex
This study keeps getting attention. This otherwise alright Quillette piece: Mate Selection for Modernity Studies using data from classic online dating websites and speed-dating both found that men exhibited less…
Hiding sex differences: not a myth
Russell Warne has a new post: Implications of average group differences for the design of intelligence tests He writes: The implication is that if test creators can force an average…
Book review: The Fight for our National Intelligence (Raymond Cattell)
Raymond Cattell was one of the early 1900s eminent psychologists. Like Meehl, he had a philosophical bent with some odd ideas in ethics. That ended up getting him into trouble…
Book review: Science Wars: Politics, Gender, and Race (Anthony Walsh)
This is a short book summarizing human biodiversity stuff. Since it's from 2013, it doesn't cover the latest tranny-mania, but otherwise it covers a lot of ground. Acknowledgements sets the…
New paper out: Intelligence and General Psychopathology in the Vietnam Experience Study: A Closer Look
Kirkegaard, E. O. W., & Nyborg, H. (2021). Intelligence and General Psychopathology in the Vietnam Experience Study: A Closer Look. Mankind Quarterly, 61(4). https://doi.org/10.46469/mq.2021.61.4.2 Prior research has indicated that one…
Fluoride, good for your teeth, not bad for your brain
Many countries add fluoride to the drinking water in the belief this will improve dental health. As with anything else public health, some people think this is a grave mistake.…
PhD students aren’t what they used to be either
One very basic fact of humans is that ability to do anything varies. This is also true for ability to do cognitively demanding jobs of which the main requirement is…
New paper out: County-level USA: No Robust Relationship between Geoclimatic Variables and Cognitive Ability
This one came out in Februrary, so we are a bit behind, but that's because I wanted to time the blogpost with the video. Aaaand the video is online now.…
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