Lie detection in sex crime investigations

The introduction of Criteria-Based Content Analysis (CBCA), a verbal veracity assessment tool to assess (child) sexual abuse cases, changed the focus from nonverbal lie detection to verbal lie detection. However, CBCA has shortcomings. We first introduce CBCA together with four shortcomings. We then discuss researchers’ efforts to resolve these shortcomings. In summary, the four shortcomings and resolutions are as follows: First, CBCA-coding is complicated, but a less complicated method, called Reality Monitoring, is available. Second, all CBCA criteria are cues to truthfulness (cues more frequently reported by truth tellers than by lie tellers) and researchers are currently examining cues to deceit. Third, CBCA employs a passive interview protocol but active interview tools that exploit differences between truth tellers and lie tellers in their cognitive processing and their strategies to appear sincere have been introduced. Fourth, CBCA does not have cut-off scores for making truth/lie decisions and researchers are currently developing within-subjects measures to resolve this problem.