How is physiological arousal measured (in laboratory research)in the male?

Question

Quizplus · Accepted Answer

Penile strain gauge is the most commonly used method to measure physiological arousal in males during laboratory research. It involves attaching a small device to the penis that measures changes in girth as an indicator of increased blood flow and arousal. The other options, photoplethysmograph and photometer, are also used to measure physiological arousal but are less commonly used in males, and a penile loop is not a recognized method for measuring arousal.

How Is Physiological Arousal Measured (In Laboratory Research)in the Male