I would describe my ability to visualize as almost exactly like that in the article. I can&#x27;t answer these questions directly, but I can tell you that when I am falling asleep there is a &#x27;switch&#x27; that turns on in my brain and all of a sudden whatever I&#x27;m thinking about will appear before me in full detail, color, texture as if I were viewing an image of it. The sudden change has been enough to wake me up at times, otherwise I probably just forget about it as I drift asleep.<p>Similarly for sounds, except that I can always imagine sounds. However I can only imagine sounds that I can try to &#x27;subvocalize&#x27; with my own voice (plus humming, whistling, etc.). When on the verge of sleep I will hear gorgeous, fully orchestrated (as far as I can tell) songs. Sometimes memories of ones I know well, sometimes either something I don&#x27;t recognize or am subconciously improvising. It&#x27;s extremely alluring and makes me annoyed that I can&#x27;t do this at command. (Though friends who always have a tune of music in their heads tells me it gets annoying too.)<p>Number 8 makes me think the author is even more extreme than I in aphantasia.