I was 7 years old when I realized I did not have visual imagery and forgot about it.
30 years later, I mentioned it to a student, and she was shocked. “How can you think?”
That started an ongoing search.
How do I think? It is like talking to someone or giving a lecture. Some people listen rather than talk. And others see pictures. Or so I am told.
Here is a test of auditory imagery. When a song runs through your head, who is doing the singing?