The Aftermath and After the Aftermath of 9/11: Civility, Hostility, and Increased Friendliness

An attack such as 9/11 engenders both increased in-group solidarity and other prosocial responses and increased hostility to out-group(s) including those perceived as similar to the presumed perpetrators. We report retrospective data collected from 5 to 11 months after 9/11, from 209 New York City t...

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