galvanic skin response contact plate
Date: 1920-1940
Inventory Number: WJ0233a
Classification: Electrode
Dimensions:longuest plate: 2.4 x 7.2 x 3 cm (15/16 x 2 13/16 x 1 3/16 in.)
shortest plate: 1.8 x 6.4 x 8 cm (11/16 x 2 1/2 x 3 1/8 in.)
Description:
These rectangular contact plates are flat with rounded corners. They are probably made of zinc or are zinc plated. Each one has a binding post on which a wire was attached. The wire either collected the current produced by the skin (so it could be measured) or it induced a current in the human body in order to measure the electrical resistance of the skin.