Typical - my subscription to The Journal of Neuroscience has just lapsed.
Really, though, I would have thought that of course it's linked to reason - every aspect of human thought relies on both reason and emotion/sentiment, and they cannot be divided.
I'd need to be able to have a look at the study itself to actually be able to consider the claims made - it might just be the write up/reporting, but there seem to be a lot of unconsidered assumptions/assertions behind the research. But it seems to be saying, people who thought more about something reacted more strongly to it. Which makes sense.
Though the Reason write up conflates 'reacting more strongly' with 'being more concerned', and I'm not sure that follows. It seems to be begging the question. I shall have to think it through more.
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Of course, it's probably quite a bit more complicated than that.
You know sometimes, between the dames and the horses, I don't even know why I put my hat on.