As these people were shown each product, and then its price, their brains were being scanned. It turned out researchers could do a good job of predicting whether someone would purchase something by watching which parts of the brain got more active and which got less active. And none of these were parts of the brain mainly associated with rational deliberation; rather, they were parts associated with feelings. Like, for example, the nucleus accumbens, which plays a role in doling out pleasure and gets more active when people anticipate rewards or see things they like. The more active the
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