“…Consistently, research has shown that people are not proficient at judging truth and deception, often performing at no better than chance levels (DePaulo, Lassiter, & Stone, 1982;Memon, Vrij, & Bull, 2003;Vrij, 2000), that training programs produce only small and unreliable improvements in performance (Bull, 1989;Kassin & Fong, 1999;Porter, Woodworth, & Birt, 2000;Vrij, 1994;Zuckerman, Koestner, & Alton, 1984), and that police and other detection deception "professionals" typically perform no better than laypeople when such comparisons are made (Bull, 1989;DePaulo, 1994;DePaulo & Pfeifer, 1986;Ekman & O'Sullivan, 1991;Ekman, O'Sullivan, & Frank, 1999;Garrido & Masip, 1999;Garrido, Masip, & Herrero, 2004;Koehnken, 1987;Porter et al, 2000). In short, the law enforcement community assumes that investigators can become highly accurate judges of truth and deception (Inbau, Reid, Buckley, & Jayne, 2001), but there is little if any evidence to support this claim (for a recent meta-analysis of presumed cues to deception, see DePaulo et al, 2003; for a comprehensive review of deception detection issues in a forensic context, see .…”