Measuring the validity and reliability of forensic likelihood-ratio systems

Geoffrey Stewart Morrison

doi:10.1016/j.scijus.2011.03.002

Measuring the validity and reliability of forensic likelihood-ratio systems

Geoffrey Stewart Morrison^*

^*Corresponding author for this work

School of Social Sciences and Humanities

Research output: Contribution to journal › Review article › peer-review

Abstract

There has been a great deal of concern recently about validity and reliability in forensic science. This paper reviews for a broad target audience metrics of validity and reliability (accuracy and precision) which have been applied in forensic voice comparison and which are potentially applicable in other branches of forensic science. The metric of validity is the log likelihood-ratio cost (C_llr), and the metric of reliability is an empirical estimate of credible intervals. A revised procedure for the calculation of credible intervals is introduced.

Original language	English
Pages (from-to)	91-98
Number of pages	8
Journal	Science and Justice
Volume	51
Issue number	3
DOIs	https://doi.org/10.1016/j.scijus.2011.03.002
Publication status	Published - Sept 2011

Keywords

Accuracy
Forensic
Likelihood ratio
Precision
Reliability
Validity

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10.1016/j.scijus.2011.03.002

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title = "Measuring the validity and reliability of forensic likelihood-ratio systems",

abstract = "There has been a great deal of concern recently about validity and reliability in forensic science. This paper reviews for a broad target audience metrics of validity and reliability (accuracy and precision) which have been applied in forensic voice comparison and which are potentially applicable in other branches of forensic science. The metric of validity is the log likelihood-ratio cost (Cllr), and the metric of reliability is an empirical estimate of credible intervals. A revised procedure for the calculation of credible intervals is introduced.",

keywords = "Accuracy, Forensic, Likelihood ratio, Precision, Reliability, Validity",

author = "Morrison, {Geoffrey Stewart}",

year = "2011",

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AB - There has been a great deal of concern recently about validity and reliability in forensic science. This paper reviews for a broad target audience metrics of validity and reliability (accuracy and precision) which have been applied in forensic voice comparison and which are potentially applicable in other branches of forensic science. The metric of validity is the log likelihood-ratio cost (Cllr), and the metric of reliability is an empirical estimate of credible intervals. A revised procedure for the calculation of credible intervals is introduced.

KW - Accuracy

KW - Forensic

KW - Likelihood ratio

KW - Precision

KW - Reliability

KW - Validity

UR - http://www.scopus.com/inward/record.url?scp=80052260613&partnerID=8YFLogxK

UR - https://www.sciencedirect.com/science/article/pii/S1355030611000256

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DO - 10.1016/j.scijus.2011.03.002

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SP - 91

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JO - Science and Justice

JF - Science and Justice

IS - 3

ER -

Measuring the validity and reliability of forensic likelihood-ratio systems

Abstract

Keywords

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