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As others have said, limited sample size and no control make this a study of limited value. On top of that, there's no evidence in the study (mainly because that wasn't the purpose of the study) that increased connectedness in the brains of the participants had any tangible advantage or effect.
I've seen this story a few places, and I don't see what makes it newsworthy. Essentially, the takeaway here is that novels may or may not have a lasting affect on the brain, and that affect may or may not translate into...something. Maybe further studies could reveal something interesting, but right now there's nothing here.
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