TY - JOUR

T1 - A critical analysis of the Model Statement literature: should this tool be used in practice?

AU - Porter, Cody

AU - Taylor, Rachel

AU - Salvanelli, Giacomo

PY - 2020/10/14

Y1 - 2020/10/14

N2 - 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.

AB - 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.

KW - deception

KW - model statement

KW - critical analysis

KW - information elicitation

KW - investigative interviewing

KW - lie-detection

U2 - 10.1002/jip.1563

DO - 10.1002/jip.1563

M3 - Article

JO - Journal of Investigative Psychology and Offender Profiling

JF - Journal of Investigative Psychology and Offender Profiling

SN - 1544-4759

ER -