A white supremacist on YouTube will tell you all about race and IQ but if you want to read a careful scholarly refutation, obtaining a legal PDF from the journal publisher would cost you $14.95, a price nobody in their right mind would pay for one article if they can’t get institutional access.
You can find a free version of the article debunking race and IQ myths on ResearchGate, a site that has engaged in mass copyright infringement in order to make research accessible. Often, because journal publishers tightly control access to their copyrighted work in order to charge those exorbitant fees for PDFs, the versions of articles that you can get for free are drafts that have not yet gone through peer review, and have thus been subjected to less scrutiny. This means that the more reliable an article is, the less accessible it is.
“The more reliable an article is, the less accessible it is,” really is a powerful and concerning sentence.