These days, you can hop on the Internet and buy yourself a consumer-grade brain scanning device for just a few hundred dollars.
"By putting something on your head, you're actually providing an extra source of information," Bonaci says. The information leaking from your skull could be very revealing, she says. "The consequences of providing that signal without thinking about it are probably similar to the consequences of giving your DNA sample to some online database."
It sounds far-fetched, but.. the day may come when millions of people play online games while wearing BCIs. Whoever controls the game could play "20 Questions," measuring players' emotional responses to what they see.
"I could show political candidates and begin to understand your political orientation, and then sell that to pollsters."
Read more at NPR
