As I mentioned before, I love the squiggly lines at the bottom of CNN's screen, showing instant reaction to the debates. But Nate Silver at 538 has a good post about their limitations -- mainly, that it only represents 30 people not randomly chosen. Get 300 people in a room with little dials, and now we're talking.
I just love that dial technology. How can I get each of my students one for my classroom? Now that would be a pedagogical revolution.
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