I don't think this test is adequate. By that standard I would have aphantasia as well. This seems to use the same misguided approach as dream researchers who

I don't think this test is adequate. By that standard I would have aphantasia as well. This seems to use the same misguided approach as dream researchers who thought that dreams were in black and white, even though it is trivial to find someone who reports dreaming in or about color. People can perfectly well remember a dream without coloring it in. The simple resolution is: dreams and internal images are not necessarily associated with color. Memories most likely have (or even are) strong associations with other parts of the brain. For some, it is impossible to separate one part from the other. So some people hear sounds when they remember something, some people have visual images, others have emotions, yet others have fear and anxiety, all associated with a trigger or memory. This differs from memory to memory, from person to person, and even over time in the same individual. Yes, there probably are some people with aphantasia, but it is most definitely not the 50% of Hacker News who self-reports it every time this comes up. Edit: anecdotal evidence that may require people who think they have aphantasia to reconsider: I once had a dream about a close friend. When I woke up, I remember seeing the friend in my dream, standing. However, I could not remember from the dream whether I could see my friend's face, or whether I viewed him from the back. Those specific details were simply not filled in at dream-time. My hypothesis is: dreams fire concepts, not actual pixel imagery. Makes perfect sense from a neurological point of view. Same probably goes for internal phantasia.