I did their ball experiment with a college group bc it was a blow off class. Basically, you have people close their eyes and imagine a ball rolling off a table and hitting the ground. You probably don’t have aphantasia if you can describe in detail the desk, the ball, and the floor itself. for example, the people I asked gave various answers for the ball size, the ball color, and even what ball they were seeing. I also asked more about the floor and table details as well and they gave similar varied but precise answers. In comparison to me, I could not really give a specific answer and had to ask myself questions to give “life” to the situation. We didn’t have much time to elaborate, but it was pretty interesting. Not really an experiment or scientific though.
I used to freak out about it, but now I just realize there is a possibility they asked these questions already and formed the image in their mind. Because after doing this question preparation for myself, I was able to recall from the imagined situation a similar level of detail.
I suspect a majority of people already ask themselves questions like this and they “internalize” it, or do it without thinking it. Maybe it’s real maybe it’s not but it doesn’t really hinder you. I would be more interested what conditions would foster the supposed differentiated aphantasia and “non-aphantasia” thinking. Is it different teaching frameworks? idk, but research literally barely exists and no one knows how to test it