The American Medical Association and the Congressional Office of Technology Assessment have said that polygraphs give a false report as often as 50 percent of the time . A professor of psychology and neurobiology is developing a lie detector that measures brain waves , rather than bodily functions , as do the polygraphs now in use . ``If sensory information has a special meaning for you ... then your brain will respond with a special kind of trough called the P3 wave,'' he said. He claims that it will pick up 70 to 80 percent of those lying , and will falsely report no one . The developer also claims that the new detector will be on the market in four years , and it will cost ten times as much as the polygraph machines now in use .
The American Medical Association and the Congressional Office of Technology Assessment have said that polygraphs give a false report as often as 50 percent of the time . A professor of psychology and neurobiology is developing a lie detector that measures brain waves , rather than bodily functions , as do the polygraphs now in use . He claims that it will pick up 70 to 80 percent of those lying , and will falsely report no one . The developer also claims that the new detector will be on the market in four years , and it will cost ten times as much as the polygraph machines now in use .