From a report at the link below:
The most urgent necessity is the complete elimination of this testing in connection with employment. All remaining state and federal laws that allow use of the polygraph, in or outside of court settings, should be abandoned. Moreover, as long as it remains in use, there is simply no justification for prosecuting those who provide information about how to “pass” such a test.
Unfortunately, various state and national polygraph certifying and licensing organizations—whose livelihood depends upon their own continued existence—are well entrenched in our society. Their provision of services to most law enforcement agencies creates a symbiotic relationship that is difficult to overcome. Nevertheless, to eradicate this blight the scientific community, as well as others who understand these concepts, must educate the public and relentlessly urge the responsible authorities to discontinue the present unsatisfactory status quo.
Lie detector test results are not admissible in almost every court of law for a reason. They are not reliable. Then why do some companies require job applicants to submit to a lie detector?
Full report here.