This is a fascinating article that talks a lot about HOW writers think. The studies show that some writers are more active in the visual processing areas of the brain, while writing. Others are more active in the speech processing areas while doing the same exercises. For me the important statements came at the very end of the article, where they speculate on possible issues with the study.
I personally get very tied up with the emotions of the scene, and often find myself visualizing my more important scenes.
Which brings me to the big question for those of you reading this.: When you write, do you hear, feel, or see what you’re writing about?