OAK RIDGE (AP) - A cold nose knows the truth, say researchers who are developing an alternative polygraph test based on face temperature.
The Center for Human Reliability Studies, which is part of the Department of Energy's Oak Ridge Institute for Science and Education, has tested a technique called infrared thermography on 40 volunteers so far.
While the volunteers were answering questions, an infrared camera took pictures of their faces. The temperature on and around the nose was the most responsive.
Researchers believe skin temperature will drop when people are lying because blood capillaries restrict when a person's nervous system is responding to deception.