Galvanic skin response meter
The measure of GSR signal is based on a constant voltage system.
#Galvanic skin response meter skin#
The conductance makes the signal explanation easier, since the greater the sweat gland activity, the higher the skin conductance. Conductance is the opposite of resistance and is measured in Siemens. Actually GSR measures conductance not resistance. So to measure GSR, we take advantage of the electrical properties of the skin. the greater sweat gland activity, the more perspiration, and thus, less skin resistance. Then the signal is sent through the electrode to the wire that passes information to GSR device.įigure 1: GSR device The skin resistance varies with sweat gland activity, i.e. Two electrodes are attached to the body, when there is more sweat activity. The low resistance of skin during high stress is due to increase in blood supply to the skin. If the stress level is high the skin offers less resistance, and if the body is relaxed the skin resistance is high. The device is based on the principle that resistance of skin varies in accordance with our emotional states. Working: It measures sweat gland activity due emotional stimulation. Research has shown how this is linked to emotional stimulation. Our level of emotional stimulation changes in response to the environment we are in if something is scary, threatening, joyful, or otherwise emotionally relevant, then the subsequent change in emotional response that we experience also increases eccrine sweat gland activity. Introduction: GSR: The galvanic skin response refers to changes in sweat gland activity that are reflective of the intensity of our emotional state, otherwise known as emotional stimulation. The changes in skin conductance are measured by the sensor in micro Siemens (µS). This response produces a change in skin conductivity during periods of stress, excitement or shock. Galvanic skin response sensor(GSR) Galvanic Skin Response (GSR) Sensor measures the psycho-galvanic response.