This measures how conductive a person's skin is at the particular moment. This can be done by measuring the amount of sweat present in the hands. This ingenious technology was developed by Sony.
To make this possible a Galvanizing sensor is present in the handle of the joystick. This sensor detects the amount of sweat produced in the hands. So, if the sensor detects sweat in user's hands, it will understand that the user is tensed.
But sadly this technology is not present in the finalized version of "Dual Shock 4". But do not worry, the new Dual Shock 4 controller has many new features. The new controller is "First-person-shooter" game friendly.
