Method of Multichannel Galvanic Skin Response Detection for Improving Measurement Accuracy and Noise/Artifact Rejection

摘要

Proposed is a method of multichannel GSR detection for improving measurement accuracy and noise/artifact rejection in measurement of the galvanic skin response on the skin of an individual. The method comprises multichannel GSR signal detection with at least two electrode pairs that are attached to a body of an individual in contact with the skin in different locations, wherein the GSR signals are measured and recorded while the level of excitation of the nervous system of the individual varies. The method is based on the fact that only events that show high temporal correlation in two or more signal registration channels are considered to be physiological GSR reactions. Time-domain correlation allows not only improved detection of high-amplitude events but also improved sensitivity to smaller events that were ignored in standard bipolar GSR recording.

主权项

1. A method of multichannel galvanic skin response detection for improving measurement accuracy and noise/artifact rejection in measurement of the galvanic skin response on the skin of an individual, the method comprising the following steps:
providing multichannel signal detection with at least two electrode pairs for at least two-channel GSR measurements; attaching these at least two electrode pairs in different locations on the body of an individual in contact with the skin of the individual; applying current to the electrode pairs and measuring and recording the GSR signals simultaneously through said at least two channels in said different locations in different physiological and/psychological states of the individual; obtaining recorded GSR data while the level of excitation of the nervous system of the individual varies, the recorded GSR data containing synchronous GSR signals and nonsynchronous GSR signals; revealing from the recorded data the noise/artifact signals as data that constitute nonsynchronous GSR signals in said different locations; and removing the nonsynchronous GSR signals from the recorded data, thus leaving only those data that relate only to synchronous GSR signals.