Bernard R. Highley, psychologist for the Alfred L. Willson Children's Center in Columbus, Ohio, demonstrates, with a model, how he has adapted a General Electric photoelectric recorder (right) for use with a lie detector in emotion tests to unearth hidden causes for the misbehavior of problem children. The recorder detects, and makes a permanent record, of minute changes in the electric conductivity of the skin on the palms or surface of the hands. Psychologists have long known that emotional reactions change the conductivity of this skin, but Highley says "the extreme sensitivity of the recorder reveals for the first time the true characteristics of the minute changes in skin conductance."

General Electric Company · [ca. July 1950]

[Information from item housing] Lie Detectors