I got curious and wanted to see what method they are using: I believe they are using data from this portal? https://implicit.harvard.edu/implicit/selectatest.html
Looks like anyone can take this! But I guess that also means... did the dyslexics/dyscalculics self-select themselves?
Edit: took one. There is a demographics questionnaire where you can list whether you have disabilities, dyslexia is in there (but not Autism??)... So it is self-selected. And on unrelated note, I am apparently in the 1% that has a strong automatic preference for physically disabled rather than not-disabled people (facepalm
Oh my! I didn't know what to expect, and I have to say... I was quite surprised by some of your answers. Also confirmed to me that I am definitely not normal
Not many replies that are indicative of Aphantasia so... here goes nothing. I tried really hard at this okay
spoiler
I don't "see" see anything when I close my eyes. I can create a very vague concept of a ball, a table, and... kind of a person in my head, but I don't actually see the scene, I used to think when people say imagining things they were just making a metaphor. Things get really funk from here... But the overall schema feels more like one of those badly drawn scenes from the hit visual novel Slay the Princess. And yes I imagined it in 2D for some reason