Rude Behavior Literally Spreads Like a Disease

Researchers at the University of Florida have demonstrated that being the target of rude behavior, or even witnessing it, "induced" rudeness in individuals. And rude behavior can have even more insidious effects than that: People exposed to it tended to interpret even ambiguous and benign behaviors as rude, which then caused them to behave rudely, initiating a whole feedback loop of meanness. 

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