التفاصيل البيبلوغرافية
العنوان: |
Accuracy of comparison decisions by forensic firearms examiners. |
المؤلفون: |
Monson, Keith L., Smith, Erich D., Peters, Eugene M. |
المصدر: |
Journal of Forensic Sciences; Jan2023, Vol. 68 Issue 1, p86-100, 15p |
مصطلحات موضوعية: |
FIREARMS, ERROR rates, ERROR probability, FALSE positive error, CHI-squared test, BULLETS, BINOMIAL theorem, ESTIMATES |
مصطلحات جغرافية: |
UNITED States |
مستخلص: |
This black box study assessed the performance of forensic firearms examiners in the United States. It involved three different types of firearms and 173 volunteers who performed a total of 8640 comparisons of both bullets and cartridge cases. The overall false‐positive error rate was estimated as 0.656% and 0.933% for bullets and cartridge cases, respectively, while the rate of false negatives was estimated as 2.87% and 1.87% for bullets and cartridge cases, respectively. The majority of errors were made by a limited number of examiners. Because chi‐square tests of independence strongly suggest that error probabilities are not the same for each examiner, these are maximum‐likelihood estimates based on the beta‐binomial probability model and do not depend on an assumption of equal examiner‐specific error rates. Corresponding 95% confidence intervals are (0.305%, 1.42%) and (0.548%, 1.57%) for false positives for bullets and cartridge cases, respectively, and (1.89%, 4.26%) and (1.16%, 2.99%) for false negatives for bullets and cartridge cases, respectively. The results of this study are consistent with prior studies, despite its comprehensive design and challenging specimens. [ABSTRACT FROM AUTHOR] |
|
Copyright of Journal of Forensic Sciences is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) |
قاعدة البيانات: |
Complementary Index |