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Circumferential change scores in phallometric assessment: normative data.
1Psychology Department, Stony Mountain Institution, PO Box 4500, Winnipeg, Manitoba, Canada R3C 3W8. howesrj@csc-scc.gc.ca
Sexual Abuse : a Journal of Research and Treatment
|October 24, 2003
Summary
This study provides an empirical basis for interpreting phallometric data when full arousal is not achieved during testing. New methods improve the accuracy of Percent Full Erection (PFE) score calculations for sexual offender assessments.
Area of Science:
- Forensic Psychology
- Sexology
- Psychometrics
Background:
- Phallometric testing is widely used for assessing sexual offenders.
- Interpretation challenges arise when full penile arousal is not achieved during testing.
- Current Percent Full Erection (PFE) score calculations involve speculation in such cases.
Purpose of the Study:
- To eliminate speculation in PFE score calculation through empirical data.
- To establish a reliable method for interpreting phallometric data with partial arousal.
- To enhance the scientific rigor of phallometric assessments.
Main Methods:
- Collected circumferential change scores from flaccidity to full erection.
- Data gathered from 724 respondents across nine North American correctional facilities.
- Calculated descriptive statistics and analyzed score distribution characteristics.
Main Results:
- Established descriptive statistics for penile circumferential change during arousal.
- Provided an empirical foundation for calculating PFE scores with partial arousal.
- Offered specific confidence levels for interpreting phallometric data.
Conclusions:
- The research offers a more objective approach to phallometric data interpretation.
- Empirical data reduces speculation in PFE score calculations for partial arousal cases.
- A rigorous scientific approach is essential for phallometric assessment to reach its full potential.