Galvanic Skin Response

The truth will set you free! Galvanic Skin Response, or Electrodermal Activity has been used since the 1920s in Police lie detectors, and recently has enjoyed a little bit more of the limelight as an arousal meter. Some awesome folks have made tools to help autistic children see empathy with this tool!

Its a simple yet pretty amazing technology. When people get excited or stress they secrete micro sweat which is often imperceivable to the human eye. The greatest concentration of sweat glands is on your finger tips, so this is a good place to measure the change, although the underside of your wrist isnt too bad as well if you need to be moving around while you measure this.

Learn to relax, and get to know your friends so much better. The finger electrodes are currently a DIY on instructables, so this app is only for those game! http://www.instructables.com/id/IPhone-Excitement-Meter/