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Eyewitness Memory01:22

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Eyewitness memory refers to the recollection of events by someone who has directly witnessed them, often serving as critical evidence in legal settings. This type of memory is commonly used in criminal cases where a witness describes details like a suspect's appearance, clothing, or behavior during a crime. However, despite its perceived reliability, eyewitness memory is prone to significant errors.
One such error is memory distortion, which occurs because human memory does not function like a...
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Related Experiment Video

Updated: Jun 5, 2026

Holistic Facial Composite Creation and Subsequent Video Line-up Eyewitness Identification Paradigm
09:49

Holistic Facial Composite Creation and Subsequent Video Line-up Eyewitness Identification Paradigm

Published on: December 24, 2015

Postidentification feedback affects subsequent eyewitness identification performance.

Matthew A Palmer1, Neil Brewer, Nathan Weber

  • 1School of Psychology, Flinders University, Adelaide, South Australia, Australia. matthew.palmer@flinders.edu.au

Journal of Experimental Psychology. Applied
|January 5, 2011
PubMed
Summary
This summary is machine-generated.

Receiving feedback after a first eyewitness lineup can impair performance on a second lineup. However, accurate feedback after correctly rejecting the first lineup can maintain performance, suggesting memory flexibility.

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Area of Science:

  • Psychology
  • Cognitive Psychology
  • Forensic Psychology

Background:

  • Eyewitnesses may encounter multiple identification procedures during investigations.
  • The impact of post-identification feedback on subsequent lineup performance is not fully understood.

Purpose of the Study:

  • To investigate how feedback after an initial lineup influences eyewitness performance on a subsequent lineup.
  • To examine the role of discriminability and response bias in feedback effects.

Main Methods:

  • 621 witnesses viewed a mock crime and participated in two sequential lineups.
  • Participants received accurate feedback after the first lineup (target-absent).
  • A signal detection approach analyzed identification accuracy, discriminability, and response bias.

Main Results:

  • Feedback after an incorrect initial identification impaired performance on the second lineup.
  • Feedback after a correct initial rejection improved performance on the second lineup.
  • Only those receiving feedback after a correct rejection performed comparably to a single-lineup control.

Conclusions:

  • An initial lineup can impair subsequent identification accuracy, but feedback's effect depends on initial performance.
  • Memory retrieval and decision-making processes in eyewitnesses are flexible.
  • Feedback effects on identification may be mediated by metacognitive beliefs about memory accuracy.