The study:
https://www.sciencedirect.com/science/article/abs/pii/S016028962200023X
The stated purpose:
we investigated whether individuals with IQs ≤ 90 who completed college experienced the same social and economic benefits higher-IQ college graduates did.
The hilarious accidental money shot:
Although most individuals with IQs ≤ 90 did not have a college degree, the rate at which they completed college had increased approximately 6-fold in men and 10-fold in women relative to rates in the previous generation.
So the researchers were trying to instill confidence in their sample size, but they inadvertent revealed what most of us have suspected for years: colleges are rubber stamping degrees for stupid people in general and stupid women in particular.
Given average white IQ is ten points higher than 90 while average black IQ is five points lower, it’s probably safe to assume that most of these cognitively challenged college grads are black women a.k.a. the most insufferable and belligerent demographic on the planet.
We’re fast tracking literal retards into positions of authority and influence because muh racism. Bodes well!
Its also important to acknowledge that, unless you have a learning disability (including retardation) that impacts your IQ, then IQ is mostly a measure of speed and memory than anything else. A high IQ person is not inherently "smart"; humans still have to train themselves to acquire and retain knowledge/information. This is why people put such high importance on recognizing gifted individuals when they are still very young.
Think of a computer and its hardware. A bottom of the barrel computer can do pretty much the same things as a computer full of flagship components, provided there are no defects and infinite time available...but the flagship PC will do said things much faster and 'recall' things from memory better, which opens up additional capabilities.
At the same time, if the supercomputer doesn't actually make use any of its advantages or has certain inefficiencies, it'll look almost the same as the bottom of the barrel computer.
If you're worried about your focus, time management, etc., you might want to consider explicitly working on those aspects, or even seeing a behavioral health specialist, especially if you're potentially an undiagnosed adult with autism.
If you end up getting a neuro-psyche exam at the request of the specialist, you'll find out your IQ.