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Type: Journal article
Title: The role of estimator variables in eyewitness identification
Author: Semmler, C.
Dunn, J.
Mickes, L.
Wixted, J.
Citation: Journal of Experimental Psychology: Applied, 2018; 24(3):400-415
Publisher: American Psychological Association
Issue Date: 2018
ISSN: 1076-898X
Statement of
Carolyn Semmler, John Dunn, Laura Mickes, John T. Wixted
Abstract: Estimator variables are factors that can affect the accuracy of eyewitness identifications but that are outside of the control of the criminal justice system. Examples include (1) the duration of exposure to the perpetrator, (2) the passage of time between the crime and the identification (retention interval), (3) the distance between the witness and the perpetrator at the time of the crime. Suboptimal estimator variables (e.g., long distance) have long been thought to reduce the reliability of eyewitness identifications (IDs), but recent evidence suggests that this is not true of IDs made with high confidence and may or may not be true of IDs made with lower confidence. The evidence suggests that while suboptimal estimator variables decrease discriminability (i.e., the ability to distinguish innocent from guilty suspects), they do not decrease the reliability of IDs made with high confidence. Such findings are inconsistent with the longstanding “optimality hypothesis” and therefore require a new theoretical framework. Here, we propose that a signal-detection-based likelihood ratio account – which has long been a mainstay of basic theories of recognition memory – naturally accounts for these findings.
Keywords: Eyewitness identification; confidence and accuracy; estimator variables; system variables
Description: This article was published Online First February 1, 2018
Rights: © 2018 American Psychological Association
RMID: 0030083500
DOI: 10.1037/xap0000157
Grant ID:
Appears in Collections:Psychology publications

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