In this particular experiment subjects were asked to make a series of arbitrary choices between 2 items, while being hooked up to some brain scanning equipment. Subjects were asked to think about it for 5 seconds before making the choice.

The experiment showed that scientists were able to predict the choice before the subjects consciously reasoned about it. So the experiment indicates that the choice is made subconsciously, and the reasoning ends up on whatever choice was made.

This aligns pretty well with some other psychological theories, and it points at that a lot/most of our brain processes happen subconsciously, and our conscious experience mainly serves as a way of providing a coherent story about why we experience what we experience.

So it seems that no matter if you 'think' abstractly or visually or with a monologue, this is merely a small step in our overall cognition, and doesn't really change the fact that thing bubble up from our subconscious before we become conscious of it.