"The GSR sensor is measuring arousal, basically how much you are sweating. Two electrodes are strapped usually in two fingers. In the ase of the Arduino, one was connected to the 5V and the other to one of the analog 0/I and the to the GND. The concept of the GSR sensor is based on the fact that our body is used as a resistor. According to what you are measuring the data that you get, show how easy (conductance) or how difficult (resistance) it is for the current to pass through your body. "


FROM http://ftmedia.eu/?page_id=311


how the sensor i am hoping to produce actually works scientifically. isnt the body amazing? i wonder if static electricity will affect readings taken from such a sensor? or if your skin is damp? or how much pressure you apply the sensor onto your skin?