It is an interrogation technique—nothing more. If you get stressed about lying as most people do you will probably get more stressed during a polygraph and your

It is an interrogation technique—nothing more. If you get stressed about lying as most people do you will probably get more stressed during a polygraph and your physical response will be measurable. This allows them to pressure you into admitting something you rather not admit. If you are a sociopath or practiced you will probably do just fine. In fact, my pet theory is that some of our problems with policing in the US are a direct result of hiring practices such as the use of personality tests and the polygraph. I suspect you may inadvertently pass people who are experienced liars at a far greater than normal rate under normal interviewing practices.