The discriminability of rapists from non-sex offenders using phallometric measures: A meta-analysis

The authors examined how well identified rapists could be discriminated from non-sex offenders using phallometric assessments, what variables might moderate this discrimination, and whether rapists respond more to descriptions of rape than to consenting sex. 11 primary and 5 secondary phallometric studies involving 415 rapists and 192 non-sex offenders were examined using meta-analytic techniques. Study effect sizes averaged 0.82 (95% confidence interval 0.16 to 1.49). Only stimulus set was a statistically significant moderator of effect size: Stimulus sets that contained more graphic rape descriptions produced better discrimination between rapists and non-sex offenders. There was a trend for stimulus sets that contained more exemplars of rape descriptions to achieve better discrimination. Also, rapists responded more to rape than to consenting sex cues in 9 of the 16 data sets and in all 8 of those using the more effective stimulus sets. (PsycINFO Database Record (c) 2002 APA, all rights reserved)
Author: 
Lalumiere,Martin L.
Quinsey,Vernon L.
Notes: 
LA- English AN- 1994-25782-001
Reprint Status: 
IN FILE
Start Page: 
150
End Page: 
175
Journal/Periodical Name: 
Criminal Justice and Behavior
Volume: 
21
Issue: 
1
Abstract: 
The meta-analysis presented in this article was conducted in an effort to determine if there is a difference between rapists and non-sex offenders using phallometric measures. Possible variables were sought to determine the degree to which the rapists and non-sex offenders are distinguishable. The findings show that rapists respond more to brutal and graphic rape cues and non-sex offenders respond to cues of consenting sex. The limitations of this study are discussed.
Topic Areas: 
Perpetration; risk
Reference Type: 
JOUR
Reference ID: 
219
Publication Date: 
1994