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Showup identification decisions for multiple perpetrator crimes: testing for sequential dependencies


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Tupper, N, Sauerland, M, Sauer, JD ORCID: 0000-0002-0872-3647, Broers, NJ, Charman, SD and Hope, L 2018 , 'Showup identification decisions for multiple perpetrator crimes: testing for sequential dependencies' , PloS ONE, vol. 13, no. 12 , pp. 1-23 , doi: 10.1371/journal.pone.0208403.

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Research in perception and recognition demonstrates that a current decision (i) can be influenced by previous ones (i-j), meaning that subsequent responses are not always independent. Experiments 1 and 2 tested whether initial showup identification decisions impact choosing behavior for subsequent showup identification responses. Participants watched a mock crime film involving three perpetrators and later made three showup identification decisions, one showup for each perpetrator. Across both experiments, evidence for sequential dependencies for choosing behavior was not consistently predictable. In Experiment 1, responses on the third, target-present showup assimilated towards previous choosing. In Experiment 2, responses on the second showup contrasted previous choosing regardless of target-presence. Experiment 3 examined whether differences in number of test trials in the eyewitness (vs. basic recognition) paradigm could account for the absence of hypothesized ability to predict patterns of sequential dependencies in Experiments 1 and 2. Sequential dependencies were detected in recognition decisions over many trials, including recognition for faces: the probability of a yes response on the current trial increased if the previous response was also yes (vs. no). However, choosing behavior on previous trials did not predict individual recognition decisions on the current trial. Thus, while sequential dependencies did arise to some extent, results suggest that the integrity of identification and recognition decisions are not likely to be impacted by making multiple decisions in a row.

Item Type: Article
Authors/Creators:Tupper, N and Sauerland, M and Sauer, JD and Broers, NJ and Charman, SD and Hope, L
Keywords: eyewitness identification, sequential dependencies
Journal or Publication Title: PloS ONE
Publisher: Public Library of Science
ISSN: 1932-6203
DOI / ID Number: 10.1371/journal.pone.0208403
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Copyright 2018 Tupper et al. Licensed under Creative Commons Attribution 4.0 International (CC BY 4.0)

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