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See Inside Scientific American Mind Volume 23, Issue 1

Claims & Caveats

A larger network of Facebook friends correlates with a greater volume of gray matter in the amygdala, an emotion-processing region, according to a recent study.

BUT: The study could not conclude whether the increased gray matter came from having more friends online or whether having more gray matter wins you more friends.

This article was originally published with the title "Claims & Caveats."

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