Galvanometer

According to Answers.com a psycho galvanometer is an instrument for testing mental reaction by determining how skin resistance changes when a voltage is applied to electrodes in contact with the skin.



The Galvanometer has been found to be a useful tool for assessing the potential effectiveness of advertisements, direct mail messages, package copy, and other marcom messages.

www.lie2me.net/thepolygraphmuseum/id24.html

Here are some pictures of the Galvanometer.

Has anyone ever been part of an advertisement pretest?


Shelby