Two sites on the hand may be used, medial phalange of the fingers, or palm. Sensitive response to thoughts is only found at two places on the body, the hand and foot. At low levels, this happens all the time, as the mind experiences thoughts and emotion. It is based in the primitive 'fight or flight' response, whereby the body prepares itself for the exertion needed to deal with a perceived threat by increasing sweat activity to cool itself. Skin Conductance is also known as Galvanic Skin Response (GSR) or Electrodermal activity (EDA), but Skin Conductance is the currently used term. SC response (SCR) provides an indication of arousal. Skin conductance (SC) is normally measured with 8mm diameter silver/silver chloride electrodes positioned on the medial phalanx of the index and middle fingers held in position by double sided sticky electrode collars. The system accommodates a wide variety of experiment including showing pictures, playing sounds, and recording synchronized video in computer file. The PsychLab SC instrument provides for high resolution skin conductance measurement to produce publishable data. Designing an experiment with specific responses
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