Research has shown that a model statement elicits more information during an interview and that truth tellers and liars report a similar amount of extra information. We hypothesised that veracity differences would arise if the total amount of information would be split up into core details and peripheral details. A total of 119 truth tellers and liars reported a stand-out event that they had experienced in the last two years. Truth tellers had actually experienced the event and liars made up a story. Half of the participants were given a model statement during the interview. After exposure to a model statement, truth tellers and liars reported a similar amount of extra core information, but liars reported significantly more peripheral information. The variable details becomes an indicator of deceit in a model statement interview protocol as long as a distinction is made between core and peripheral details.
(From the journal abstract)
Sharon Leal, Aldert Vrij, Haneen Deeb, and Louise Jupe. 2018. ‘Using the Model Statement to Elicit Verbal Differences Between Truth Tellers and Liars: The Benefit of Examining Core and Peripheral Details’. Journal of Applied Research in Memory and Cognition, 7 (4): 610–17. https://doi.org/10.1016/j.jarmac.2018.07.001.