- photo- + plethysmograph (Wiktionary)
“What really matters to women, Dr. Chivers said, at least in the somewhat artificial setting of watching movies while intimately hooked up to a device called a photoplethysmograph, is not the gender of the actor, but the degree of sensuality.”
“Their reactions are tracked using a tampon-shaped "photoplethysmograph," which measures vaginal blood flow in women, and a comparable "rigiscan" in men.”
“She regularly wires the genitals of her patients to a photoplethysmograph to measure whether the women respond with surges of vaginal blood flow while they watch a pornographic video.”
“Two types of sensors were used: an electrocardiogram, which measures electrical pulses, and a photoplethysmograph (PPG), which works out a heart rate from variation in light absorption under the skin.”
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