But the Medvec-Gilovich-Madey study has been replicated. Even its replications have been replicated. For example, David Matsumoto of San Francisco State University assembled about 21,000 photographs from the men’s and women’s judo competitions at the 2004 Olympic Games in Athens, a massive photo set that represented 84 athletes from 35 countries. Regardless of the national origin or ethnicity of the athletes, the difference in facial expression among the medalists was striking. During the podium ceremonies, the gold medalists were almost all smiling widely (what’s called a “Duchenne smile”).
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