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Showup identification decisions for multiple perpetrator crimes: Testing for sequential dependencies.

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Area of Science:

  • Cognitive Psychology
  • Forensic Psychology
  • Perception and Recognition

Background:

  • Previous decisions can influence current choices, indicating response dependencies.
  • Eyewitness identification research explores how sequential decisions impact accuracy.

Purpose of the Study:

  • To investigate if initial showup identification decisions affect subsequent choices.
  • To determine if patterns of sequential dependencies in identification are predictable.
  • To examine the role of trial numbers in recognition paradigms on dependency detection.

Main Methods:

  • Participants made multiple showup identification decisions after viewing a mock crime.
  • Experiments 1 and 2 analyzed sequential dependencies in choosing behavior.
  • Experiment 3 compared eyewitness and basic recognition paradigms with varying trial numbers.

Main Results:

  • Sequential dependencies in choosing behavior were inconsistently predictable across experiments.
  • Experiment 1 showed assimilation towards previous choices in one condition.
  • Experiment 2 demonstrated contrasting choices based on prior responses.
  • Sequential dependencies were found in recognition decisions over many trials, but not consistently predictive of individual choices.

Conclusions:

  • While some sequential dependencies in decision-making exist, they are not consistently predictable in showup identifications.
  • The integrity of eyewitness identification and recognition decisions is unlikely to be negatively impacted by making multiple sequential decisions.