Beliefs about error rates and human judgment in forensic science

Article


Ribeiro, Gianni, Tangen, Jason M. and McKimmie, Blake M. 2019. "Beliefs about error rates and human judgment in forensic science." Forensic Science International. 297 (1), pp. 138-147. https://doi.org/10.1016/j.forsciint.2019.01.034
Article Title

Beliefs about error rates and human judgment in forensic science

ERA Journal ID35101
Article CategoryArticle
AuthorsRibeiro, Gianni, Tangen, Jason M. and McKimmie, Blake M
Journal TitleForensic Science International
Journal Citation297 (1), pp. 138-147
Number of Pages10
Year2019
PublisherElsevier
Place of PublicationIreland
ISSN0379-0738
1872-6283
Digital Object Identifier (DOI)https://doi.org/10.1016/j.forsciint.2019.01.034
Web Address (URL)https://www.sciencedirect.com/science/article/pii/S0379073818307072
Abstract

Forensic science techniques are often used in criminal trials to infer the identity of the perpetrator of crime and jurors often find this evidence very persuasive. Unfortunately, two of the leading causes of wrongful convictions are forensic science testing errors and false or misleading forensic testimony (Saks and Koehler, 2005). Therefore, it is important to understand jurors’ pre-existing beliefs about forensic science, as these beliefs may impact how they evaluate forensic evidence in the courtroom. In this study, we examine people’s perceptions of the likelihood of error and human judgment involved at each stage of the forensic science process (i.e., collection, storage, testing, analysis, reporting, and presenting). In addition, we examine people’s perceptions of the accuracy of — and human judgment involved in — 16 different forensic techniques. We find that, in contrast to what would be expected by the CSI effect literature, participants believed that the process of forensic science involved considerable human judgment and was relatively error-prone. In addition, participants had wide-ranging beliefs about the accuracy of various forensic techniques, ranging from 65.18% (document analysis) up to 89.95% (DNA). For some forensic techniques, estimates were lower than that found in experimental proficiency studies, suggesting that our participants are more skeptical of certain forensic evidence than they need to be.

KeywordsForensic science; Forensic evidence; Accuracy; Error rate; CSI effect
ANZSRC Field of Research 2020520402. Decision making
520103. Forensic psychology
Public Notes

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Byline AffiliationsUniversity of Queensland
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