I don’t make a sound or word in my mind but I definitely keep track of the number. My thinking is definitely structured and there are things in my thoughts but there is no words or voice. I also can’t see images in my mind either. I’ve no idea what an inner monologue or the minds eye is like. I have however over the years found ways to produce these experiences in a way of my own. I found for instance some rough visualization was helpful in doing multi variate calculus but it’s very difficult and took a lot of practice. I’ve also been able to simulate language in my mind to help me practice difficult conversations but it’s really difficult and not distinct.
I would note though I have a really difficult time with arithmetic and mechanical tasks like counting. Mostly I just lose attention. Perhaps an inner voice would help if it became something that kept a continuity of thought.
Can you draft a sentence (with all the words precisely determined) in your mind before you say it or you write it down? Can you "rehearse" saying it without moving your tongue or mouth? If yes, that's pretty much an "inner voice".
Not really, I can speak it out loud though which is often what I do. I have over the years been able to do it in my mind but it’s not really a voice or words but some conceptual framing of the words. It’s difficult to explain.
I would note though I have a really difficult time with arithmetic and mechanical tasks like counting. Mostly I just lose attention. Perhaps an inner voice would help if it became something that kept a continuity of thought.