AIM: The labial photoplethysmograph (LP), a new measure for assessing genital responses in women, was compared to the vaginal photoplethysmograph (VP). METHODS: Fifteen women wore both devices simultaneously while viewing neutral, sexual, sexually-threatening, and threatening film clips. RESULTS: The LP and VP exhibited comparable specificity to sexual stimuli. Additionally, the LP demonstrated greater resistance to movement artifacts and a slightly higher correspondence with subjective measures of sexual arousal. CONCLUSION: The LP, while somewhat more difficult to place and less comfortable than the VP, is a promising new measure of genital response in women that warrants further development.
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Prause et al. (2005) studied this question.
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