Clothes and Self-Perception - The New York Times

http://www.nytimes.com/2012/04/03/science/clothes-and-self-perception.html
Clothes and Self-Perception - The New York Times

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If you wear a white coat that you believe belongs to a doctor, your ability to pay attention increases sharply. But if you wear the same white coat believing it belongs to a painter, you will show no such improvement.