I always wonder how people see or think during different kind of activity. Do they visualize pictures, do they say word, do the imagine things? What happens when someone try to solve math problems, what they think about? For example when I'm reading or writing, I always "say out loud the words" in my head, when writing code, sometimes it's easier for me to think about visual representation of a problem, like diagrams, sets, draw X-es or anything. My father see a big virtual map in front of him when driving. How do you think? (Especially during coding or solving problems.)