psychogalvanometer

Thereupon the judge called in a psychologist and tested Goldman with a psychogalvanometer which, by recording electrical impulses in a man's skin, is supposed to show whether he answers questions truthfully.

Ph.D., head of Fordham University's department of psychology, the psychogalvanometer works not on the heart and lungs but on the minute electrical currents coursing through the body.

Tested last week in Manhattan was another such instrument�the psychogalvanometer.