The efficacy of using countermeasures in a model statement interview

Aldert Vrij, Sharon Leal, Ronald P. Fisher, Samantha Mann, Haneen Deeb, Eunkyung Jo, Claudia Castro Campos, Samer Hamzeh

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Abstract

In a countermeasures experiment, we examined to what extent liars who learn about the Model Statement tool and about the proportion of complications (complications/complications + common knowledge details + self-handicapping strategies) can successfully adjust their responses so that they sound like truth tellers. Truth tellers discussed a trip they had made; liars fabricated a story. Participants were of Lebanese, Mexican, and South-Korean origin. Prior to the interview they did or did not receive information about (i) the working of the Model statement and (ii) three types of verbal detail: complications, common knowledge details and self-handicapping strategies. We found no evidence that liars sounded like truth tellers after being informed about the Model Statement and/or types of detail we examined. Actually, veracity differences were similar across experimental conditions, with truth tellers reporting more detail and more complications and obtaining a higher proportion of complications score than liars.
Original languageEnglish
Pages (from-to)23-34
Number of pages12
JournalThe European Journal of Psychology Applied to Legal Context
Volume12
Issue number1
DOIs
Publication statusPublished - 1 Dec 2019

Keywords

  • countermeasures
  • information gathering
  • deception
  • model statement
  • proportion of complications

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