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Facilitating memory-based lie detection in immediate and delayed interviewing: The role of mnemonics

Journal article
Authors Aleksandras Izotovas
Aldert Vrij
Lorraine Hope
Samantha Mann
Pär-Anders Granhag
Leif Strömwall
Published in Applied Cognitive Psychology
Volume 32
Issue 5
Pages 561-574
ISSN 08884080
Publication year 2018
Published at Department of Psychology
Pages 561-574
Language en
Links dx.doi.org/10.1002/acp.3435
https://onlinelibrary.wiley.com/doi...
Keywords consistency, delay, memory, mnemonics, reality monitoring, repeated interviews, richness of detail, verbal lie detection
Subject categories Applied Psychology, Psychology (excluding Applied Psychology)

Abstract

© 2018 John Wiley & Sons, Ltd. We experimentally investigated how different mnemonic techniques employed in an interview conducted immediately after an event affected truth tellers' and liars' responses when they were interviewed again after a 2-week delay. We also compared how verbal accounts changed over time within truth tellers and liars, and how consistent both groups were. Participants (n = 143) were shown a mock intelligence operation video and instructed either to tell the truth or lie about its contents in two interviews, one of which was immediately after watching the video and the other after a 2-week delay. In the immediate interview, they were asked to provide a free recall and then asked to provide further information via one of three mnemonics: context reinstatement, sketch, or event-line. In the delayed interview, they were asked to provide only a free recall. Truth tellers reported more visual, spatial, temporal, and action details than did liars both immediately and after a delay. Truth tellers experienced more of a decline in reporting details after a delay than did liars, and this decline was affected by the mnemonic used. Truth tellers thus showed, more than liars, patterns of reporting indicative of genuine memory decay. Liars produced patterns of a “stability bias” instead. Truth tellers and liars were equally consistent between their immediate and delayed statements.

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