Examining the impact of warnings on eyewitness memory

Area of Science:

• Cognitive Psychology
• Forensic Psychology

Background:

• Eyewitness memory is vulnerable to post-event misinformation.
• Prior research shows warnings can mitigate misinformation effects.

Purpose of the Study:

• Investigate the impact of warning timing (pre- vs. post-exposure) and frequency on eyewitness memory accuracy.
• Examine how warnings affect metacognitive assessments of memory accuracy.

Main Methods:

• Two experiments were conducted with mock eyewitnesses.
• Experiment 1 compared pre-warning and post-warning effectiveness.
• Experiment 2 manipulated warning frequency (one vs. two warnings).

Main Results:

• Both pre- and post-warnings similarly reduced misinformation's negative impact on memory.
• Repeated warnings also improved memory accuracy and metacognitive assessments.
• However, repeated warnings led to lower confidence in uncontaminated memory accuracy.

Conclusions:

• Warnings enhance eyewitness memory accuracy and support the memory-confidence relationship.
• Over-warning can lead to under-confidence in accurate eyewitness recall.