“…Beyond the inherent difficulty of measuring unknown events, there are differences in defining what undetected sexual offending is, methods for studying frequency rates, and how to account for individual differences in offending behavior. Previous studies have relied on surveys or interviews of potential victims (Koss et al, 1987) and potential offenders (Abel et al, 1987;Koss et al, 1987;Lauritsen & Rezey, 2013;Lisak & Miller, 2002;Sinozich & Langton, 2014;Stephens et al, 2021) in the community. Other studies have used self-report interviews or questionnaires of those in custody for other sexual offenses (Bourke & Hernandez, 2009;DeLisi et al, 2016;Drury et al, 2020;Groth et al, 1982;Weinrott & Saylor, 1991), and reports of clinicians or community supervising agents (Falshaw et al, 2003).…”