Shankar Vedantam

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If anybody with Internet access eventually sees the offer click here and take an online personality test, they're not very scientific. But they can be fun. BuzzFeed had a quiz called Which "Star Wars" Villain are You? Well, some employers are using more rigorous personality tests. So what can they really reveal about the people who take them? Here's NPR's social science correspondent Shankar Vedantam.

(SOUNDBITE OF FILM, "HARRY POTTER AND THE SORCERER'S STONE")

Authenticity is a trait we all prize. We all want the real thing - whether that thing is a designer purse, or a loving relationship.

But the two stories you'll hear today raise profound questions about authenticity and nature of human belief: If you believe something is real, if you can fall in love with someone or stand in awe of a painting, is it possible that it doesn't actually matter whether the object of your affection is fake?

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