That actually has never been asked before. It’s a very interesting question.
I’d have to say that I do imagine some of the scenes, but only the scenes that are most vivid. Normally if the scene involves nature of some sort or a landscape (trees, riverbed, mountain), I tend to imagine it in my head more so than just the words.
I also tend to imagine scenes involving bodies- skin, hands, bones, human contact, that kind of thing.
Sometimes I don’t imagine the scenes in my head at all, and sometimes they’re very vague, like sketches or outlines of things.