Assertion: sexual arousal | /r/HasProperty | measured
Facets:
value: directly
type: MANNER
value: from his erection
type: OTHER
Source sentences:
text: He states that while a man's sexual arousal can be directly measured from his erection (see penile plethysmograph), a woman's sexual arousal cannot be measured as clearly (see vaginal photoplethysmograph), and therefore research concerning female sexuality is rarely as conclusive as research on men.