Ronald Heifetz draws on his training as a psychiatrist to coach aspiring leaders at Harvard's John F. Kennedy School of Government. Ben de la Cruz/NPR hide caption

itoggle caption Ben de la Cruz/NPR

Kids might be more satisfied if they get one good treat instead of one good treat and one lesser treat. iStockphoto.com hide caption

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When it comes to nature versus nurture, brain scientists think both matter. Daniel Horowitz for NPR hide caption

itoggle caption Daniel Horowitz for NPR

Football fans ate fattier meals the day after their teams lost a game, a study found. iStockphoto.com hide caption

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Security guards stand outside newspaper offices in Guangdong province in January, where banners and flowers were laid in protest of censorship. AP hide caption

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The poor tend to value social connections, psychologists say. But as people become wealthy, they need one another less and — according to some scientists — make fewer connections. Images.com/Corbis hide caption

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Pregnant doctors are less likely than other women to deliver their babies via C-section, recent research suggests. Economists say that may be because the physician patients feel more empowered to question the obstetrician. iStockphoto.com hide caption

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