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Showup identification decisions for multiple perpetrator crimes: Testing for sequential dependencies
Nina Tupper1,2, Melanie Sauerland1, James D Sauer2,3
1Maastricht University, Department of Clinical Psychological Science, Maastricht, The Netherlands.
Plos One
|December 7, 2018
Summary
Sequential dependencies in eyewitness identification are inconsistent. While some choices may be influenced by prior decisions, multiple showup identifications do not appear to compromise decision integrity.
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.
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