Which country do you fit in?
There are hundreds of values tests on the internet. Almost all of these are theory-based also known as made-up dimensions. These are dimensions that one could think of, make some…
Dimensions of the dating mind
A decade ago I got into my first media circus by scraping the OKCupid dating site. The site uses (or used) a novel approach of having users answer 100s of…
g-loadings of tests on taketest.xyz
Many people were asking me about the g-loadings of the tests on the site. The answer is somewhat complicated because: We don't have many people who took all the tests.…
Semen quality and intelligence
Back in the 2000s, there was some interest in semen quality and intelligence: Arden, R., Gottfredson, L. S., Miller, G., & Pierce, A. (2009). Intelligence and semen quality are positively…
Explore psychological correlations at taketest.xyz
Have just finished a neat update to the site. On the correlations page you can now see the matrix of cross-test sample sizes: You can click any of the green…
Race differences in reaction time: data from NHANES 3
Whenever race differences in cognitive ability broadly speaking are brought up, they encounter huge skeptical and emotional opposition. This is understandable, though not grounded in science. One common claim is…
Migrant performance on PISA worldwide
There are some data memes floating around like this one: In German, it shows the performance of Turks on PISA math by year and destination country. It can be seen…
Top universities and national intelligence
We all know that universities differ in quality. But what exactly do we mean by that? How do we determine which are the top universities? There are a number of…
Skin color and intelligence in Latin America
Skin color (lightness or brightness) has been used as a proxy for genetic ancestry for over 100 years. It works alright in many cases. Take this study (Parra et al…
Race, intelligence, and inequality in Brazil
Many years ago I discovered that Brazil publishes the subject level data for many scale testing efforts. These also come with rich surveys concerning the children's homes. The main tests…
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