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Related Experiment Videos

Biased lineups: sequential presentation reduces the problem.

R C Lindsay1, J A Lea, G J Nosworthy

  • 1Department of Psychology, Queen's University, Kingston, Ontario, Canada.

The Journal of Applied Psychology
|December 1, 1991
PubMed
Summary
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Sequential lineup presentation significantly reduces false eyewitness identifications, even in biased lineups. This method is recommended for police to improve accuracy and reduce wrongful convictions.

Area of Science:

  • Forensic Psychology
  • Cognitive Psychology
  • Criminal Justice

Background:

  • Biased police lineups increase false eyewitness identifications.
  • Previous research suggests sequential lineup presentation may reduce false identifications by minimizing relative judgment.

Purpose of the Study:

  • To investigate the impact of lineup biases and sequential presentation on eyewitness recognition accuracy.
  • To determine if sequential lineup presentation mitigates false identifications in various biased lineup conditions.

Main Methods:

  • Conducted five staged-crime experiments.
  • Manipulated lineup fairness (fair vs. biased with foil similarity, instructions, witness attire).
  • Compared identification accuracy between simultaneous and sequential lineup presentations.

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Main Results:

  • Sequential lineup presentation significantly decreased false identification rates across all conditions, including fair and variously biased lineups.
  • Correct identification rates were not negatively affected by sequential presentation.

Conclusions:

  • Sequential lineup presentation is an effective strategy to reduce false eyewitness identifications.
  • Police departments should adopt sequential lineup procedures to enhance the reliability of eyewitness testimony.