Penile plethysmography

Penile plethysmography is a test measuring the variation of penis size in response to audio and/or visual stimuli. The size of the penis is commonly determined by its circumference using a mercury strain gauge, and was originally intended as a way of measuring sexual arousal. The Penile plethysmograph (PPG) device was developed by Czechoslovak researcher Kurt Freund in the 1950s. The motivation for its development was to prevent draft dodgers from claiming that they were homosexual in order to avoid military service.

The female counterpart is vaginal photoplethysmography.

See also: fruit machine

External links

• The skeptic's dictionary entry on penile plethysmography
• "Can we identify the sexual predator by use of penile plethysmography?"
• The Penile Plethysmograph in False Allegation Cases

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