A comment on the PCAST report: Skip the “match”/“non-match” stage

Geoffrey Stewart Morrison, David H. Kaye, David J. Balding, Duncan Taylor, Philip Dawid, Colin G G Aitken, Simone Gittelson, Grzegorz Zadora, Bernard Robertson, Sheila Willis, Susan Pope, Martin Neil, Kristy A. Martire, Amanda Hepler, Richard D. Gill, Allan Jamieson, Jacob de Zoete, R. Brent Ostrum, Amke Caliebe

Research output: Contribution to journalLetter

8 Citations (Scopus)

Abstract

This letter comments on the report “Forensic science in criminal courts: Ensuring scientific validity of feature-comparison methods” recently released by the President's Council of Advisors on Science and Technology (PCAST). The report advocates a procedure for evaluation of forensic evidence that is a two-stage procedure in which the first stage is “match”/“non-match” and the second stage is empirical assessment of sensitivity (correct acceptance) and false alarm (false acceptance) rates. Almost always, quantitative data from feature-comparison methods are continuously-valued and have within-source variability. We explain why a two-stage procedure is not appropriate for this type of data, and recommend use of statistical procedures which are appropriate.

Original languageEnglish (US)
Pages (from-to)e7-e9
JournalForensic Science International
Volume272
DOIs
StatePublished - Mar 1 2017

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Technology
Forensic Sciences

All Science Journal Classification (ASJC) codes

  • Pathology and Forensic Medicine

Cite this

Morrison, G. S., Kaye, D. H., Balding, D. J., Taylor, D., Dawid, P., Aitken, C. G. G., ... Caliebe, A. (2017). A comment on the PCAST report: Skip the “match”/“non-match” stage. Forensic Science International, 272, e7-e9. https://doi.org/10.1016/j.forsciint.2016.10.018
Morrison, Geoffrey Stewart ; Kaye, David H. ; Balding, David J. ; Taylor, Duncan ; Dawid, Philip ; Aitken, Colin G G ; Gittelson, Simone ; Zadora, Grzegorz ; Robertson, Bernard ; Willis, Sheila ; Pope, Susan ; Neil, Martin ; Martire, Kristy A. ; Hepler, Amanda ; Gill, Richard D. ; Jamieson, Allan ; de Zoete, Jacob ; Ostrum, R. Brent ; Caliebe, Amke. / A comment on the PCAST report : Skip the “match”/“non-match” stage. In: Forensic Science International. 2017 ; Vol. 272. pp. e7-e9.
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abstract = "This letter comments on the report “Forensic science in criminal courts: Ensuring scientific validity of feature-comparison methods” recently released by the President's Council of Advisors on Science and Technology (PCAST). The report advocates a procedure for evaluation of forensic evidence that is a two-stage procedure in which the first stage is “match”/“non-match” and the second stage is empirical assessment of sensitivity (correct acceptance) and false alarm (false acceptance) rates. Almost always, quantitative data from feature-comparison methods are continuously-valued and have within-source variability. We explain why a two-stage procedure is not appropriate for this type of data, and recommend use of statistical procedures which are appropriate.",
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Morrison, GS, Kaye, DH, Balding, DJ, Taylor, D, Dawid, P, Aitken, CGG, Gittelson, S, Zadora, G, Robertson, B, Willis, S, Pope, S, Neil, M, Martire, KA, Hepler, A, Gill, RD, Jamieson, A, de Zoete, J, Ostrum, RB & Caliebe, A 2017, 'A comment on the PCAST report: Skip the “match”/“non-match” stage', Forensic Science International, vol. 272, pp. e7-e9. https://doi.org/10.1016/j.forsciint.2016.10.018

A comment on the PCAST report : Skip the “match”/“non-match” stage. / Morrison, Geoffrey Stewart; Kaye, David H.; Balding, David J.; Taylor, Duncan; Dawid, Philip; Aitken, Colin G G; Gittelson, Simone; Zadora, Grzegorz; Robertson, Bernard; Willis, Sheila; Pope, Susan; Neil, Martin; Martire, Kristy A.; Hepler, Amanda; Gill, Richard D.; Jamieson, Allan; de Zoete, Jacob; Ostrum, R. Brent; Caliebe, Amke.

In: Forensic Science International, Vol. 272, 01.03.2017, p. e7-e9.

Research output: Contribution to journalLetter

TY - JOUR

T1 - A comment on the PCAST report

T2 - Skip the “match”/“non-match” stage

AU - Morrison, Geoffrey Stewart

AU - Kaye, David H.

AU - Balding, David J.

AU - Taylor, Duncan

AU - Dawid, Philip

AU - Aitken, Colin G G

AU - Gittelson, Simone

AU - Zadora, Grzegorz

AU - Robertson, Bernard

AU - Willis, Sheila

AU - Pope, Susan

AU - Neil, Martin

AU - Martire, Kristy A.

AU - Hepler, Amanda

AU - Gill, Richard D.

AU - Jamieson, Allan

AU - de Zoete, Jacob

AU - Ostrum, R. Brent

AU - Caliebe, Amke

PY - 2017/3/1

Y1 - 2017/3/1

N2 - This letter comments on the report “Forensic science in criminal courts: Ensuring scientific validity of feature-comparison methods” recently released by the President's Council of Advisors on Science and Technology (PCAST). The report advocates a procedure for evaluation of forensic evidence that is a two-stage procedure in which the first stage is “match”/“non-match” and the second stage is empirical assessment of sensitivity (correct acceptance) and false alarm (false acceptance) rates. Almost always, quantitative data from feature-comparison methods are continuously-valued and have within-source variability. We explain why a two-stage procedure is not appropriate for this type of data, and recommend use of statistical procedures which are appropriate.

AB - This letter comments on the report “Forensic science in criminal courts: Ensuring scientific validity of feature-comparison methods” recently released by the President's Council of Advisors on Science and Technology (PCAST). The report advocates a procedure for evaluation of forensic evidence that is a two-stage procedure in which the first stage is “match”/“non-match” and the second stage is empirical assessment of sensitivity (correct acceptance) and false alarm (false acceptance) rates. Almost always, quantitative data from feature-comparison methods are continuously-valued and have within-source variability. We explain why a two-stage procedure is not appropriate for this type of data, and recommend use of statistical procedures which are appropriate.

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SP - e7-e9

JO - Forensic Science International

JF - Forensic Science International

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