Bradford scientists say they're cleverer than this...
Can you tell if someone’s lying? It’s harder than you might think, which is why investigators and border agencies sometimes look to science and technology for help. The polygraph – or plain old lie detector – has been around since 1921, but it’s an intrusive technique and many authorities don’t trust its results. Last month at the British Science Festival in Bradford, a team of scientists presented what they say is a more precise detector which can spot a lie just from the look on someone’s face. Here’s my report from Bradford for Spectrum on Deutsche Welle Radio: