This empirical study examined whether polygraph testing would result in sex offenders engaging in fewer high-risk behaviors. It was concluded that polygraph testing resulted in offenders engaging in less high risk behavior, although the possibility that offenders fabricated reports of high-risk behaviours to satisfy examiners is also considered; similarly, offenders seemed to be more honest with their supervisors, but this only occurred after experience of the test itself. Feedback from offenders who completed the study, taken together with the high drop out rate, suggested that those motivated not to reoffend found polygraphy useful, while those less motivated sought to avoid it.