As long-time readers know, my independent research has found that the Flynn effect, when properly studied, has only been about 1 point a decade on the Wechsler in Northern America, and not 3 points a decade as Flynn had claimed.
But why should anyone believe me, a nobody blogger, over one of the greatest psychologists of the 20th century?
Because I’ve found some research in support of my claim. A study where the original WISC, which was normed in 1947, was given to a fairly representative sample of American kids circa 1967.
Source: Pasewark, R. A., Sawyer, R. N., Smith, E., Wasserberger, M., Dell, D., Brito, H., & Lee, R. (1967). Concurrent Validity of the French Pictorial Test of Intelligence. The Journal of Educational Research, 61(4), 179–183.
If the Flynn effect were 3 points a decade, we’d expected kids tested on a 20-year-old test to average 6 points above the U.S. mean of 100, but instead they only averaged 3 points above 100, consistent with a Flynn Effect of 1.5 points per decade.
Pumpkin Person 
1 point is still a lot over 7 or 8 decades that will be preposterous growth even it is only in specialized and/or spatial abilities!
It’s what’s expected from growth in brain size caused by better nutrition
yeah of course but the fact that we are that much smarter than our predecessors is nothing to be scoffed at right?
i mean 8 points in IQ due to better nutrition would mean that the entirety of the planet must have gotten a whole lot smarter not just minimally.
not to mention there are places undergoing the Flynn Effect as we speak possibly Africa and India to mention a few. this would mean that the alterations in those societies will be tremendous!
That’s right. African and India have the potential to be about 8 points smarter once Bill Gates solves their nutrition and disease problems (disease prevents the body from using nutrients)
im not sure if youre intending to be sarcastic Pumpkin but those would be tremendous gains that would lead to many facets of their society being altered 180 degrees including their economies.
Bill Gates doesn’t care about india. Indians are civilised so thats a red flag for Bill.
Yes I agree pill.
sadly, peepee is played by all the other actors.
Poor Mug of Pee. The whole World has left him behind.
just because something is obvious to you doesnt mean itll be other people! remember that assuming the worst about people is oftentimes true.
ive learned this from previous experience no doubt!
This is only 1 small sample puppy. Flynn probably had access to a lot more data than you.
But his data was arguably contaminated by the Kaufman effect & statistical artifacts:
https://pumpkinperson.com/2020/03/28/north-american-iq-circa-1937-to-circa-2014-2nd-edition/
Pp, What do you think about James Sidis?
from WAIS-III to WAIS-IV and from WISC-IV to WISC-V the Flynn effect is about 3 points per decade, I suspect that this disappears or even reverses when only the younger groups are considered (15-29).
There is evidence that the Flynn effect is greater in younger children, probably because children reach their potential faster with modern education and stimulus, even if these children have a lower potential than previous generations, they can achieve better results when they are younger.
https://sci-hub.se/https://pubmed.ncbi.nlm.nih.gov/32322129/
The Flynn effect begins to reverse at age 15.
In the case of the WAIS, older people must be responsible for most of the flynn effect, since nutrition problems and poor schooling were much more common in the past and each new generation made significant gains in these areas which reflected well on the iq tests.
If the Flynn Effect is caused (partly) by schooling, we’d expect it to be larger in adults educational differences between generations are much greater in adults than in kids.
Studies with twins show that children’s IQ is more sensitive to the environment.
Are you aware of any samples that show IQ gains for young adults?
Young adults in Norway have lower scores than previous generations, the same thing for South Korea.
Crazy how the Internet is such a shit hole nowadays! honestly im glad i live where i live because people are much more benevolent irl than online! its made people so toxic! i cant even deal.
i would say im one of the few internet users who has extremely fringe views who is still advocating for benevolence and not nihilism. it sucks we have such a distorted view of the world today where it leads to suffering and failures.