Facilitating Memory-Based Lie Detection in Immediate and Delayed Interviewing: The Role of Sketch Mnemonic

Abstract

Memory enhancing techniques, or mnemonics, are typically recommended in evidence-based investigative interviewing guidelines. In the current study, the use of a sketch mnemonic and its effect on the responses of truth tellers and liars was examined. Participants (n = 49) watched a mock intelligence operation video. They were instructed to tell the truth or lie about this operation in an interview immediately afterwards, and again after a two-week delay. In both interviews participants were requested to make a sketch of the place of the mock operation, and then to verbally describe the drawing. Results revealed that truth tellers reported more visual, spatial, temporal, and action details than liars in the immediate interview. Truth tellers also reported more spatial, temporal and action details than liars in the delayed interview. Truth tellers experienced a decline in reporting action details after the delay, whereas liars did not show a decline in reporting any details over time. Thus, truth-tellers showed patterns of reporting indicative of genuine memory decay, whereas liars produced patterns reflecting a ‘stability bias’. Between-statement consistency was not different across veracity conditions.

Corroding Innocence: An Examination of Perceptions and Evaluations of Suspect Alibis Across the Investigative Timeline

“…In a similar study where liars and truth tellers were asked to recall event details immediately following an event and then again two weeks later, truth tellers showed a decrease in reporting some event details. In contrast, liars did not show this decline, and instead their recall of event details was relatively stable (Izotovas et al, 2020). This suggests that truth tellers show recall patterns that are more in line with true memory processes, as their memory decays over time, whereas liars show a stability bias (Izotovas et al, 2020).…”

“…In contrast, liars did not show this decline, and instead their recall of event details was relatively stable (Izotovas et al, 2020). This suggests that truth tellers show recall patterns that are more in line with true memory processes, as their memory decays over time, whereas liars show a stability bias (Izotovas et al, 2020).…”

Investigating Cuisine Experiences in the Maldives: A Novel Research Method Utilizing Tasting Buffets

“…In terms of the sampling criteria for Sthapit's research, participants had to have visited Rovaniemi, Finland, within the last two years and eaten local food while at the destination. Various studies within different fields have highlighted the credibility of immediacy, compared to delayed interviews which could lead to an increase in imprecisions (e.g., Hagsand et al, 2017;Izotovas et al, 2020;Tuckey & Brewer, 2001), therefore compromising trustworthiness and dependability.…”