The man was suspicious that his girlfriend was having an affair. The girlfriend insisted she wasn't. Despite the fact they were married to other people, the man strongly suspected his girlfriend had ...

Polygraph measurements — derived from changes in blood pressure, breathing depth, and skin conductivity of an electric current — have never been proved to be reliable indicators of deception. Not only ...

The polygraph is not a lie detector but rather an instrument that measures a person’s physiological changes to questions posed by the examiner. An elevated physiological response to a particular ...

When it comes to lying, our brains are much more likely to give us away than sweaty palms or spikes in heart rate, new evidence suggests. The study found that scanning people's brains with fMRI, or ...