KRWG

Shankar Vedantam

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Have you ever had a bad day at school or work or an awful commute home and then taken out your bad mood on a colleague or even your spouse? I'm going to bet you have. How's that?

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Many companies are investing money in social media to advertise new products. But they could be paying a hidden price for those ads.

Read more:

Wang, Shuting and Greenwood, Brad N. and Pavlou, Paul A., Tempting Fate: Social Media Posts by Firms, Customer Purchases, and the Loss of Followers (July 10, 2017). Fox School of Business Research Paper No. 17-022.

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This HIDDEN BRAIN. I'm Shankar Vedantam. For many years, tech companies have been really good at innovation and making money. What they've been less good at is in hiring and keeping a diverse workforce.

(SOUNDBITE OF ARCHIVED RECORDING)

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This HIDDEN BRAIN. I'm Shankar Vedantam. For many years, tech companies have been really good at innovation and making money. What they've been less good at is in hiring and keeping a diverse workforce.

(SOUNDBITE OF ARCHIVED RECORDING)

How great would it be to win a brand new car? How horrible would it be to get laid off from your job? Research by psychologist Dan Gilbert at Harvard University suggests not that great and not that horrible (respectively).

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Every year, many students who have overcome daunting obstacles in high school receive good news — they've been accepted to college.

These kids represent a success story: through hard work and determination, they've made into college, and perhaps even on to a better life.

Except it doesn't always work out that way.

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Turn on the TV, and you'll find no shortage of people who claim to know what's going to happen: who's going to get picked for the NBA draft, who will win the next election, which stocks will go up or down.

These pundits and prognosticators all have an air of certainty. And why shouldn't they? We, as the audience, like to hear the world's complexity distilled into simple, pithy accounts. It doesn't help that these commentators rarely pay a serious price when their predictions don't pan out.

President Trump has often accused the news media of not covering terrorist attacks adequately. In a speech in February he said, "Radical Islamic terrorists are determined to strike our homeland as they did on 9/11, as they did from Boston to Orlando to San Bernardino [...] It's gotten to a point where it's not even being reported."

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In 1969, Philip Zimbardo, a psychologist from Stanford University, ran an interesting field study. He abandoned two cars in two very different places: one in a mostly poor, crime-ridden section of New York City, and the other in a fairly affluent neighborhood of Palo Alto, Calif. Both cars were left without license plates and parked with their hoods up.

The Greek poet Archilochus wrote, "the fox knows many things, but the hedgehog knows one big thing."

There are many different interpretations of this parable, but psychologist Phil Tetlock argues it's a way of understanding two cognitive styles: Foxes have different strategies for different problems. They are comfortable with nuance, they can live with contradictions. Hedgehogs, on the other hand, focus on the big picture. They reduce every problem to one organizing principle.

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Magic.

That's what it feels like when you bump into your childhood friend on the first day of college ... or meet someone at a party in Paris, only to discover she lives in your dad's childhood home in Poughkeepsie, N.Y. But mathematician Joseph Mazur says these coincidences are not as extraordinary as we might think.

"People think that their address book is essentially the people they know, and it turns out any address book is about one percent of the people they know in some way," Mazur explains.

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If you've ever visited the palm-lined neighborhoods of Beverly Hills, you've probably noticed that the rich and famous aren't the only ones drawn there.

Stargazers also flock to this exclusive enclave, seeking a chance to peer into — and fantasize about — the lives of movie stars and film directors.

Call it adulation, adoration, idolization: we humans are fascinated by glamour and power.

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So we know that a picture speaks a thousand words, but NPR's Shankar Vedantam is here to tell us how it also gives us really strong impressions of people that we can't seem to shake. Hi, Shankar.

SHANKAR VEDANTAM, BYLINE: Hi, Rachel.

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