Secret Intelligence Service | MI6

The Human Polygraph


  1. Plug in your headphones and turn the sound on.
  2. You’re about to hear three conversations between actors. In each, we’ve asked the main person talking to hide the truth a certain number of times.
  3. Your job is to detect when the person is concealing something, simply by listening to their voice.
  4. During the recording, whenever you suspect the person talking may be hiding the truth, press the red ‘doubt’ button.
  5. Points are awarded for every doubt you flag correctly – and deducted every time you incorrectly flag something.