There are all kinds of studies out there now or banned.
I saw one study on the brain size of various races. That study was quickly banned because the wokies/lefties yelled it was racist.
You, and some others, would find this wikipedia article interesting:
IQ Classification
The way in which Intelligence Quotient is determined has changed in recent years.
In the past, someone's score on an IQ test was based on their individual performance against the test questions, and the test-taker's age. The top of the bell curve corresponded with an IQ deemed to be 100, and approximately 60% of test takers had scores in the 90-110 range.
Under the current IQ deviation method, 100 IQ is deemed to be the mean average of performance by all test takers, and the top of the bell curve.
While it may seem to some that the difference between these methods is only the choice of grammatical syntax, the methods are actually significantly different:
Lets assume that an IQ test has 100 questions of increasing difficulty, with a 50 minute time limit. The same test is given to a random group of statistically significant size in 1974, and again in 2024.
Lets assume that a score of 50/100 corresponded with an IQ of 100 in 1974, with 55 correct being 110, and 45 correct being 90.
Discounting the fact that a greater percentage of the random group in 2024 would not be as fluent in English because of immigration policies, if the mean average performance was now 45 correct answers instead of 50, what used to be an IQ of 90 is now considered to be 100. Effectively, average intelligence is now considered to be normal intelligence.
I have a small .exe IQ test with 50 multiple choice questions, which I had a house guest complete in 2017. He was slightly intoxicated at the time, he didn't take the test seriously, and he ran out of time before answering the last three questions, which were the most difficult. He scored 23/50, which corresponded with an IQ of 95, just slightly below average:
I'm a big fan of the Windows XP operating system, because it was the last Windows O/S in which the primary purpose of the computer was to execute the user's commands. A large number of Windows soft-wares don't work with Windows Vista or subsequent Windows operating systems, and laptop computers which have motherboards compatible with XP are increasingly difficult to find, (most are now in landfills).
In an effort to make computing more 'inclusive' to users with limited technical knowledge, I find that the focus of later operating systems has shifted towards offering helpful suggestions to the user, rather than obeying commands, and many work applications do most of the work on the user's behalf, with the human reduced to the role of selecting from the limited options made available.
I make computer fonts with an app from 1995, no longer sold, which only works with Windows XP and earlier operating systems. It also doesn't work with Windows Updates more recent than January, 2014, (because I have an unregistered 'cracked' version; one of the purposes of Windows updates is to search for and disable unregistered installed software). I'm able to use this app because I have it installed on XP computers which have never been connected to the Internet since the operating system and service packs 1-3 were installed by my geek.
The processing speed of a computer which has never been connected to the Internet is incredible. A Windows search which takes several minutes with Windows 10 gives me results in about a second on the XP, and I have several search parameter options no longer made available, such as specifying all files/ folders created or modified between specific calendar dates. That option was very useful when one of my computers was hacked almost exactly seven years ago.