[Trial equipment to measure skin conductance, based on the recommendations of The Society for Psychophysiological Research].

It has been recommended by The Society for Psychophysiological Research (USA) that skin conductance should be recorded by the application of constant voltage 0.5 V across the electrodes, and the resultant current should be measured by the amplification of potential across a small resistor in series with the skin. A simple and inexpensive circuit has been recommended for this purpose. However, we cannot afford the same circuit in Japan, since the reference diode LM 113 T is not available. A Japanese version for this purpose is proposed, with satisfactory results.