galvanic skin response

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun Evidence of emotional arousal obtained by attaching electrodes to any part of the skin and recording momentary changes in perspiration and other functions of the autonomic nervous system.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a change in the electrical properties of the skin in response to stress or anxiety; can be measured either by recording the electrical resistance of the skin or by recording weak currents generated by the body