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!
The things you've described are there for the retards to dilute abysmal exams. Group work is boiled down to "one person does a typical assignment alone and the rest coast on reading their presentation". I've had professors divide a lecture hall class into four groups and the only graded non-test assignments be "group discussions". I'm a very odd case because I started college in the 00's, dropped out, worked in the real world, and came back to do a bachelor's in the '20s. Shit. Got. BAD. I rode the fucking short bus in middle school and I didn't learn anything new in my required math course for college. It was all review for me, and for most of the 17-18 year olds they were asking questions like it was their first time hearing it.
Edit: Example from this semester of how dumbed down and impossible-to-fail things are now. A professor explained her criterion for a grading homework and if you get half of it right you get a 100%. Every missed question beyond that is a -5 off the grade. So if you get 1/10 questions right you get a fucking 80. They are really trying to just push everyone through.