you're also only cherrypicking what research supports your line of thought.
you know whats also well known by the scientific community regarding iq tests?
first,they're scaled yearly in a way that the average is 100. meaning the 100 iq person from 10 years ago performed worse than this years 100 iq person.
they're also kinda stupid since they don't really measure intelligence in any relatable way and that has been a point of criticism for these tests for decades now.
question design is also kinda skewed towards white middle and upper, more educated class, at times referencing vocabulary and sitationsyou'd not really find a lot among lower classes (which does include large parts of the black community) this allows scores to dip in the 'X relates to Y as Z relates to....' type of questions.
classic us sitcoms tackled that entire thing in the 70's already. and you know what that means? rearch was already aware of this 40 years ago to the point where the average tv writer could get wind of it to turn it into a plotpoint. some of the questions expect a specific answer that simply don't apply to certain groups of people as much as to others and others just happens to be the white majority.
there's also that thing were certain groups in society are much more likely to actively being prepared for these tests (like, taking a dozen tests in advance to get familiar with the design and type of question before taking an 'official' one that's added to every collage application).
the same is true for these other important tests the us has... is it SAT? same problem by design.
here, more reasons why iq tests are nonsense for people with little time
there's also an episode and a podcast of adam ruins everything throwing out more problems with iq and similar tests. and they add all the sources so if you have a couple dozen hours, you can read even more about it in fancy science speak.
I've actually seen the Video made by Adam Ruins everything and he has so much wrong in that video.
The Scientific literature on IQ is well supported and Adam did little research on this topic. I've gotten my information from Jordan Peterson from a class lecture he has free online and I trust an Expert in the field more then Adam.
I've also read the literature myself.
Here's a link to one.
https://www1.udel.edu/educ/gottfredson/30years/Rushton-Jensen30years.pdf
And yes I read all 50 pages. It also includes 9 pages of references to scientific research. Hardly little support for this.
Also consider that the gap between Black and White IQ has existed for decades since they first started IQ testing. And even though Blacks problems improved over time, the same 15 point gap still exists. Any interventions did little to improve it. There's hundred and hundreds of published papers on this over the span of 100 yrs.
For your first point what your talking about is the Flynn Effect. That IQ improves as we have better access to information than our grandparents. The problem with the Flynn effect is that its about Crystalized intelligence, not Fluid intelligence. Crystalized intelligence is knowledge you've acquired. Fluid intelligence is free from any learned knowledge, and is your brains raw processing power to problem solve, think abstractly, and identify patterns, which is free from previous acquired knowledge. The G factor (General Intelligence) is what is being measured by IQ tests, and this is the biggest gap between White and Blacks. More than culturally learned information. And you can't improve your G factor. They've tried many times and failed.
For your next point, you say that IQ tests, tests knowledge that only Rich Upper class people would know, like certain words, and the lower class will be at disadvantaged. This is not true. IQ tests like the Ravens Progressive Matrices is highly G loaded. Actually Culturally loaded tests Blacks do better on, which is what Adam was criticizing, which contradicts his point. And the Progressive Matrices is non verbal, and it gets rid of any cultural influence.
And for your other point, IQ tests are not useless. They know this because of their predictive validity to life success, income, and health. If IQ tests just tells you how well you do on an IQ test like Adam says, then it wouldn't have any predictive validity. But it does. IQ tests validity are also found world wide. They also test reaction times. The Higher IQ you have the fast your brain processes information and the faster you hit the button when signaled to. Asians had the fastest times, next whites, then blacks, which follows what IQ would predict. These are very easy to do IQ tests that a child can do, just hit a button when the light flashes.
IQ research also follows human evolution. East Asian's have the biggest brain sizes, next whites, then blacks. They measured it externally, with MRI's, and filling skulls with substance to measure its size. Humans evolved to give birth to less developed babies that takes longer to reach maturity. The reason is because its easier to push out a baby from a birth canal when they are less developed, then a more developed baby with a bigger brain. The bigger brains is the reason for the this. Even though Blacks on average give birth a week before whites, black babies are born more developed, reach maturity faster, learn to walk faster, and reach sexual maturity faster than whites. And whites faster than Asians. This follows what human evolution and IQ, and bigger brains would predict.
Here's is another link to IQ research that explains more on this.
https://www1.udel.edu/educ/gottfredson/reprints/2004socialconsequences.pdf
There's no denying this gap exists in the Scientific community. There's also a lot I haven't talked about like adoption studies and regression to the mean, but this comment is already going long enough.
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