Masters and Johnson utilized a(n) _________ to analyze male erectile responses.
a. electrocardiogram
b. penile strain gauge
c. photoplethysmograph
d. magnetic resonance imaging
Question 2
Masters and Johnson utilized a(n) _________ to measure vaginal lubrication in females.
a. electrocardiogram
b. penile strain gauge
c. photoplethysmograph
d. magnetic resonance imaging