Research Applications for Galvanic Skin Response Sensors
ADInstruments’ GSR sensors and equipment provide accurate measurement of electrodermal activity for studies in psychophysiology, stress testing, and human behaviour. These galvanic skin response products integrate with PowerLab and LabChart, allowing researchers to analyse skin conductance changes alongside other physiological signals for comprehensive research outcomes.
Overview
Human eccrine sweat glands, present on the palmar surfaces of the hands and bottoms of the feet, are innervated by the sympathetic branch of the autonomic nervous system (ANS). These glands respond readily to a person’s mental and emotional state are are often more responsive than other variables such as skin temperature.
The human eccrine glands act as variable resistors. When the eccrine glands fill with fluid, the skin resistance decreases and the conductance increase. Consequently, it is possible to measure galvanic skin response by placing two electrodes on the fingers of human subjects. The measured parameter, know as skin conductance, is expressed in microsiemens (µS). Microsiemens are a common unit of conductance.
