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>Could you imagine the value of knowing if your heart rate went up after reading a certain message, or seeing a certain ad? No, I'm guessing it's worth a coupl

• throwaway3699 5y ago
  Perhaps. But this kind of psychographic profiling is used in labs to craft better adverts. Video games are another example. The Left 4 Dead director was trained on player emotions and designed to improve the game, which was a huge success. Having access to it in the field has real applications.