This work was supported by a training grant for the second author from the National Science Foundation (EPS-0447689).
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Wavelet denoising of vaginal pulse amplitude
Article first published online: 17 DEC 2009
DOI: 10.1111/j.1469-8986.2009.00941.x
Copyright © 2009 Society for Psychophysiological Research
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How to Cite
Prause, N., Williams, K. and Bosworth, K. (2010), Wavelet denoising of vaginal pulse amplitude. Psychophysiology, 47: 393–401. doi: 10.1111/j.1469-8986.2009.00941.x
Publication History
- Issue published online: 8 FEB 2010
- Article first published online: 17 DEC 2009
- (Received February 20, 2009; Accepted May 7, 2009)
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Keywords:
- Sexual response;
- Normal volunteers;
- Vaginal photoplethysmography
Abstract
Vaginal pulse amplitude (VPA) has been the most commonly analyzed signal of the vaginal photoplethysmograph. Frequent, large, and variable-morphology artifacts typically have crowded this signal. These artifacts usually were corrected by hand, which may have introduced large differences in outcomes across laboratories. VPA signals were collected from 22 women who viewed a neutral film and a sexual film. An automated, wavelet-based, denoising algorithm was compared against the uncorrected signal and the signal corrected in the typical manner (by hand). The automated wavelet denoising resulted in the same pattern of results as the hand-corrected signal. The wavelet procedure automated artifact reduction in the VPA, and this mathematical instantiation permits the comparison of competing methods to improve signal:noise in the future.