A comparative study of psychogalvanic and association time measures––a new psychogalvanic apparatus
Abstract
A new apparatus was developed which avoids polarization by the use of a pure alternating current through dry electrodes, and permits quick and easy measurement of responses from a milliammeter, which is substituted for the galvanometer. An experiment with 100 subjects indicated that: (1) the psychogalvanic response is more accurate as a diagnostic measure than reaction time; (2) reaction time is less, whereas the psychogalvanic response is greater, in the morning than in the afternoon; (3) a stimulus word causing marked emotional disturbance has little influence upon the post-critical word.