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Related Experiment Videos

PC_Eyewitness: evaluating the New Jersey method.

Otto H MacLin1, Colin M Phelan

  • 1Department of Psychology, University of Northern Iowa, Cedar Falls, Iowa 50614, USA. otto.maclin@uni.edu

Behavior Research Methods
|August 19, 2007
PubMed
Summary
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Sequential lineup administration reduces false eyewitness identifications. However, allowing multiple lineup passes, as in the New Jersey module, eliminates this sequential advantage, impacting identification accuracy.

Area of Science:

  • Psychology
  • Forensic Science
  • Criminal Justice

Background:

  • Lineup administration procedures significantly impact eyewitness identification accuracy.
  • Sequential lineups (one at a time) reduce false identifications compared to simultaneous lineups (all at once).
  • Real-world application of sequential lineups sometimes deviates from laboratory protocols, such as allowing multiple passes.

Purpose of the Study:

  • To investigate the effect of allowing multiple passes through a lineup on identification accuracy.
  • To evaluate a modified sequential lineup procedure used in field settings.
  • To assess the impact of the "New Jersey module" on the sequential lineup advantage.

Main Methods:

  • Development of the "New Jersey module" for the PC_Eyewitness (PCE) system.

Related Experiment Videos

  • Modification of PCE to allow eyewitnesses multiple passes through a sequential lineup.
  • Comparison of identification accuracy between single-pass and multiple-pass sequential lineup conditions.

    • Main Results:

    • The benefit of sequential lineup administration was eliminated when participants were allowed a second pass.
    • Multiple passes through the lineup negated the reduction in false identifications typically observed with sequential procedures.
    • The "New Jersey module" demonstrated a significant change in identification patterns.

    Conclusions:

    • Allowing multiple passes through a sequential lineup negates its accuracy advantage.
    • Field modifications to lineup procedures require careful evaluation to ensure continued effectiveness.
    • The "New Jersey module" provides a tool for researchers and law enforcement to study and potentially refine lineup administration.