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Within-subjects verbal lie detection measures: a comparison between total detail and proportion of complications

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Background: We examined whether the verbal cue, proportion of complications, was a more diagnostic cue to deceit than the amount of information provided (e.g., total number of details).

Method: In the experiment, 53 participants were interviewed. Truth tellers (n = 27) discussed a trip they had made during the last twelve months; liars (n = 26) fabricated a story about such a trip. The interview consisted of an initial recall followed by a model statement (a detailed account of an experience unrelated to the topic of investigation) followed by a post-model statement recall. The key dependent variables were the amount of information provided and the proportion of all statements that were complications.

Results: The proportion of complications was significantly higher amongst truth tellers than amongst liars, but only in the post-model statement recall. The amount of information provided did not discriminate truth tellers from liars in either the initial or post-model statement recall.

Conclusion: The proportion of complications is a more diagnostic cue to deceit than the amount of information provided as it takes the differential verbal strategies of truth tellers and liars into account.
Original languageEnglish
Pages (from-to)265-279
JournalLegal and Criminological Psychology
Volume23
Issue number2
Early online date22 Feb 2018
DOIs
Publication statusPublished - 1 Sep 2018

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  • Within-subjects verbal lie detection measures

    Rights statement: This is the peer reviewed version of the following article: Vrij, A., Leal, S., Jupe, L. and Harvey, A. (2018), Within-subjects verbal lie detection measures: A comparison between total detail and proportion of complications. Leg Crim Psychol. doi:10.1111/lcrp.12126, which has been published in final form at http://onlinelibrary.wiley.com/doi/10.1111/lcrp.12126/full. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.

    Accepted author manuscript (Post-print), 174 KB, PDF document

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