Greg Detre: How to beat an fMRI lie detector

In a not-so-distant dystopia, you might be placed in a brain scanner to test whether you're telling the truth. Here's how to cheat. The polygraph. First, you'll need some background on old-school lie-detection technology. [This is a simplified story - see ... But ultimately, they work in an analogous way to the polygraph, by comparing your neural response to the important questions with your neural response to the baseline questions. That means that they can be gamed in ...