Abstract
THE PSYCHOGALVANIC REFLEX The galvanometer as an instrument for the study of mental and emotional states has been in use for some time, but never has it aroused the interest that it does today. It is difficult to discover the precise reason why such unusual attention has been given to this type of psychologic experimentation, unless it is a feeling that here at last is a method of studying emotional or affective states in a quantitative manner. Psychology has always recognized that to understand conduct in any thorough manner it is necessary to know more about the urges and drives, or the feeling side of human nature. The psychogalvanic reflex seems to be definitely related to emotional states. If this can be demonstrated and the differences in emotional reactions can be quantitatively measured, remarkable strides forward in the study of behavior will be possible. Work with the galvanometer, begun in

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