Amplifying recall after delays via initial interviewing: Inoculating truth-tellers' memory as a function of encoding...

Area of Science:

• Psychology
• Forensic Science
• Cognitive Science

Background:

• Truth-tellers typically provide more details immediately after an event than after a delay, indicating forgetting.
• Liars often provide similar statement details regardless of interview timing, suggesting a metacognitive error.
• The 'richness-of-detail' cue's effectiveness for lie detection diminishes with memory delays.

Purpose of the Study:

• To investigate if an initial interview can improve lie detection using the 'richness-of-detail' cue.
• To assess this in suboptimal memorial conditions: a three-week delay and manipulated truth-teller attention during encoding.

Main Methods:

• 152 participants witnessed an interaction; encoding was intentional for liars (n=50) and half of truth-tellers (n=51), and incidental for the other half of truth-tellers (n=51).
• Interviews were conducted after a three-week delay.
• Half of each group received an immediate initial interview (initial interview-present), while the other half did not (initial interview-absent).

Main Results:

• Truth-tellers (intentional and incidental) reported more detail after three weeks in the initial interview-present condition compared to the absent condition.
• Intentional liars' statement detail was not affected by the initial interviewing condition.
• Correctly distinguishing intentional liars from truth-tellers was more accurate after three weeks in the initial interview-present condition.

Conclusions:

• An initial interview can enhance the diagnostic utility of the 'richness-of-detail' cue for lie detection, particularly for truth-tellers.
• This benefit persists even under conditions of significant memory delay and varied encoding attention.
• Initial interviewing appears to be a valuable strategy for improving lie detection accuracy in forensic contexts.