A critical analysis of the Model Statement literature: Should this tool be used in practice?

Porter, Cody Normitta; Taylor, Rachel; Salvanelli, Giacomo

Abstract

Investigators need to elicit detailed statements from interviewees to find potential leads, whilst simultaneously judging if a statement is genuine or fabricated. Researchers have proposed that the Model Statement (MS) can both (a) increase information elicitation from interviewees and (b) amplify the verbal differences between liars and truth tellers, thereby enhancing lie-detection accuracy. Based upon a critical analysis of the MS literature, we argue that this tool is not currently ready for practical usage, as its utility has not been fully established. We highlight a diverse range of existing MS scripts, and a greater diversity in the dependent measures examined in conjunction with this tool. More robust replications of these procedures are needed. We also highlight why some measures of verbal content may not be suitable as outcome measures and suggest that new research could use the well-established reality monitoring criteria to allow for standardisation across studies.

• Journal Article Type: Article
• Acceptance Date: Sep 20, 2020
• Online Publication Date: Oct 14, 2020
• Publication Date: 2021-01
• Deposit Date: Apr 26, 2022
• Publicly Available Date: Apr 27, 2022
• Journal: Journal of Investigative Psychology and Offender Profiling
• Print ISSN: 1544-4759
• Electronic ISSN: 1544-4767
• Publisher: Wiley
• Peer Reviewed: Peer Reviewed
• Volume: 18
• Issue: 1
• Pages: 35-55
• DOI: https://doi.org/10.1002/jip.1563
• Keywords: Applied Psychology; Social Psychology
• Public URL: https://uwe-repository.worktribe.com/output/9294561
• Publisher URL: https://onlinelibrary.wiley.com/doi/full/10.1002/jip.1563