Child molesters frequently position themselves in organizations so as
to easily access children. Interviews for applicants of such positions
, psychological tests, home visits to applicants' residences, criminal
record checks for prior convictions, and letters of reference have al
l been used in an attempt to identify applicants with proclivities tow
ard pedophilia, but none of these methodologies have been validated. T
he standard methods for reporting the effectiveness of screening tests
are reviewed with special emphasis on the sensitivity, specificity, a
nd efficiency of such testing, within the context of the prevalence of
various diseases being screened for. Volumetric and circumferential p
hallometry have relatively high efficiencies, but their intrusiveness,
cost, and the length of the assessment process preclude their use as
a screening methodology for pedophiles within organizations. The effic
iency of a new, less intrusive, screening methodology, the Abel Screen
, compares favorably with phallometry in identifying those at risk for
involvement with prepubescent and pubescent boys. The risk of applica
nts accessing boys in institutional settings could be significantly re
duced by using the Abel Screen in such settings.