It's really important for folks to understand what is being talked about here, because I run into folks even here that are like "that's a wall of text, I'm not reading that". And that's kind of the behavior that's being talked about. Like, if you find yourself in "read the headline, not the story" you might be in this group they are talking about in this article that is linked. And do not let me come off high and mighty here, I absolutely have issues with this some times because I get all kinds of caught up with life and do not have enough time to maintain my reading habits. It is a complex issue on why there is this deterioration of reading skills. And I will likely say something to the effect of "Internet BAD!" but do know it is more than just that, it is just that is the easiest go-to for a "short" comment.

So that said. Nice little sample question one would see on a test that would test this is:

In Lions of Little Rock, two girls form a dangerous and clandestine friendship, that is challenged by racial segregation. Name, in chronological order, the multiple episodes of racist threats and violence and how they increased the tension of the relationship between the two girls.

It's not a question of "Can you read the book?" It is a question of, "Did you extract information from the book? Can you connect the dots asked in the question based on the information that you read?" Lots of people who identify themselves as literate have a lot of difficulty doing these kinds of things. So we have to understand that, this is not testing if a kid can read the word "onomatopoeia", it is testing if a person can extract useful information from written words.

All of that is different from the "eighth grade reading level" where you are typically asked things like "extrapolate what you think the underlying theme the author is trying to present." Sixth grade reading is mostly being able to put things back in the order that you read them, picking out the descriptive terms that were in the text, and identifying what the entire point was for this particular piece of work, among other things. One does not have to really get creative here, sixth grade reading is just "in slightly finer detail" being able to regurgitate what was just read. Now to get kids ready for higher reading, there is usually questions about "do you think this person at this point was feeling happy?" That kind of stuff that relies of extrapolating meaning which is usually above the "sixth grade level reading".

And it is indeed shocking how many people cannot do this. But in order to be shocked, I think people need to understand what is being tested here. A lot of social media does indeed condition folks to allow this level of reading to atrophy. The number of people who toss around TL;DR is really high and some of that is because it does not interest them. That of course is fine, but some of it is because 50% of the way through their brain is tired of reading text. AND THAT, is problematic. And really I can only touch on so much of the issue in this comment without it feeling like it is going on forever.

There are all kinds of assessment tests online that folks can review and see exactly the kind of questions that are being asked. The whence and wherefores on this matter and the causes for it happening are indeed complex and obviously I cannot cover them all here. But one big one, in my opinion, is education and its intersection with technology. Technology does indeed make lots of things easier for us, but some of those things that technology unburdens us from we should probably reexamine that relationship. Perhaps we need better education with technology or maybe we need less technology with that education, they both have pros and cons to them. There are not easy answers in this for the kind of background American education presents, which that is also an addressable matter in all of this.