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This is a thought experiment "Ball on a Table" for detecting whether someone has Aphantasia. What do you see when you perform this experiment?

This is more of me trying to understand how people imagine things, as I almost certainly have Aphantasia and didn't realize until recently... If this is against community rules, please do let me know.

The original thought experiment was from the Aphantasia subreddit. Link: https://www.reddit.com/r/Aphantasia/comments/g1e6bl/ball_on_a_table_visualization_experiment_2/

Thought experiment begins below.

Try this: Visualise (picture, imagine, whatever you want to call it) a ball on a table. Now imagine someone walks up to the table, and gives the ball a push. What happens to the ball?

Once you're done with the above, click to review the test questions:
  • What color was the ball?
  • What gender was the person that pushed the ball?
  • What did they look like?
  • What size is the ball? Like a marble, or a baseball, or a basketball, or something else?
  • What about the table, what shape was it? What is it made of?

And now the important question: Did you already know, or did you have to choose a color/gender/size, etc. after being asked these questions?


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242 comments
  • Under aphantasia, Wikipedia has a long list of famous people who have or had it.

    How can these guys have aphantasia?

    • I don't think I'm clear on what you're asking? Is it that you're confused as to how a person can be a fantasy or sci-fi author with aphantasia?

      If that is what you're asking, then as someone with aphantasia, I likely can't explain how that can happen anymore than people who don't have aphantasia (like you, I presume) could explain to me what it's like to visualise things. What I can say is that whilst I don't tend to read fiction much nowadays, I used to be an avid reader of both sci-fi and fantasy. I've found that immersive writing tends to involve descriptions that involve more senses than just sight, and also that the environment can be effectively described through how characters interact within the world. A well described world might be easy to visualise, but I don't think that being able to visualise things is necessary for producing that.

      Not least of all because all the best writers also read a lot, and fiction is predominantly written by and for people who don't have aphantasia. Through this, I would expect that an author with aphantasia would become proficient in writing that facilitates readers' visual imaginations, even if they themselves didn't engage with fiction in that manner.

      • But how would someone with aphantasia be able to describe a fictional world well?

        By definition they would need to describe something that they can't visualise

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