How does a panic meter work? Can it really measure panic?

The Panic Meter works by detecting physiological changes in the human body such as myoelectricity, pulse, blood pressure, respiration, heartbeat, brain waves, voice, pupils and so on.

General people will have subconscious physiological changes when lying, the panic meter is to observe these subtle changes to determine whether a person is lying, he will ask some ordinary things, look at the display of these data, and then in the question slowly introduced to want to know, if these data did not change, is still smooth, that is to say that the person did not lie, if there is a significant change, indicating that he is lying.

Of course, this is effective for the average person, most people tell lies with a weak heart. It doesn't work for specially trained people.