A criminal investigator measures a suspect's change in perspiration in response to questions regarding a burglary.The investigator is using which type of physiological measure?
A) GSR (galvanic skin response)
B) EMG (electromyogram)
C) EEG (electroencephalogram)
D) fMRI (functional MRI)

Question

Quizplus · Accepted Answer

GSR measures changes in the conductivity of the skin due to changes in sweat gland activity, which can reflect emotional states and physiological arousal. This physiological measure is commonly used in criminal investigations to determine a person's level of stress or anxiety during questioning. EMG measures muscle activity, EEG measures brain activity, and fMRI measures blood flow and oxygenation in the brain. While these measures may also be used in investigations, they are not as directly related to changes in emotional or physiological arousal as GSR.

A Criminal Investigator Measures a Suspect's Change in Perspiration in Response