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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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  • I don't have aphantasia, but a rather vivid imagination sometimes. Also, a lot of my answers were indirectly influenced by my immediate surroundings:
    • What color was the ball? - Red
    • What gender was the person that pushed the ball? - Male
    • What did they look like? - I only imagined seeing the person up to the waist, approaching the table and giving a push to the ball. I pictured him with social attire.
    • What size is the ball? - Tennis ball, but very smooth. It was smack dab in the middle of the table, too.
    • What about the table, what shape was it? What is it made of? - Round glass.

    A question for those of you who have, or suspect you have aphantasia, how are your dreams like? Can you imagine and "hear" sounds?

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