In law enforcement, national security, and pop culture, the lie detector is the gold standard of truth, but how reliable are ...

A polygraph is commonly known as a lie detector but it’s really just a machine with a number of sensors that measure things like heart rate, breathing rate, galvanic skin response and blood ...

In recent weeks, polygraphs have been used by top Cabinet officials to root out leakers from federal departments.

Most people think polygraphs — also called lie-detector tests — can determine whether you're lying. But the technology has its critics. "The public needs to know that polygraph testing has no ...