Almost any attire carrying some kind of significance seems to have this effect, tailored to the article as a symbol. In one study, people wearing counterfeit sunglasses were more likely lie and cheat than those wearing authentic brands, as if the fakes gave the wearers a plus to cunning. "If the object has been imbued with some meaning, we pick it up, we activate it. We wear it, and we get it on us," says Abraham Rutchick, a psychologist at California State University Northridge.
http://ualrpublicradio.org/post/cosplayers-use-costume-unleash-their-superpowers#stream/0
UALR Public Radio
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Northridge