Commentary on: Curley LJ, Munro J, Lages M, MacLean R, Murray J. Assessing cognitive bias in forensic decisions: a review and outlook. J Forensic Sci doi: 10.1111/1556-4029.14220. Epub 2019 Nov 6

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2020-01-27
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Thompson, William
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Center for Statistics and Applications in Forensic Evidence
The Center for Statistics and Applications in Forensic Evidence (CSAFE) carries out research on the scientific foundations of forensic methods, develops novel statistical methods and transfers knowledge and technological innovations to the forensic science community. We collaborate with more than 80 researchers and across six universities to drive solutions to support our forensic community partners with accessible tools, open-source databases and educational opportunities.
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In their recent critical review titled “Assessing Cognitive Bias in Forensic Decisions: A Review and Outlook,” Curley et al. 1 offer a confused and incomplete discussion of “task relevance” in forensic science. Their failure to adopt a clear and appropriate definition of “task relevance” undermines the central conclusion of their article—the assertion that it is not necessarily an error for forensic scientists to rely on task-irrelevant information and that “task-irrelevant contextual information may sometimes aid forensic decision makers.” This conceptual flaw in the article becomes clear when we define “task relevance” appropriately, in the manner it was defined by the U.S. National Commission on Forensic Science 2. The Commission’s definition provides a bright-line standard for distinguishing contextual information that is helpful and should be considered from contextual information that is unhelpful and should not be considered. Once that matter is clarified, it becomes possible to discuss intelligently whether steps should be taken to minimize examiners’ exposure to task-irrelevant information in order to reduce the potential for contextual bias.

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This letter to the editor is published as Thompson, William C. "Commentary on: Curley LJ, Munro J, Lages M, MacLean R, Murray J. Assessing cognitive bias in forensic decisions: a review and outlook. J Forensic Sci." Journal of forensic sciences 65, no. 2 (2020): 666-667. Posted with permission of CSAFE.

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Wed Jan 01 00:00:00 UTC 2020
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