Interpretation

Encyclopedia of Forensic Sciences, J.A. Siegel & P.J. Saukko eds., Waltham: Academic Press, 2d ed. 2013, vol. 1, ch. 23, pp. 134-138

11 Pages Posted: 3 Apr 2016

See all articles by David H. Kaye

David H. Kaye

PSU - Penn State Law (University Park); ASU - College of Law & School of Life Sciences

Date Written: November 8, 2011

Abstract

Forensic scientists examining an object, pattern, or impression, observe and measure physical or chemical features. They then interpret these measurements to assist investigators, lawyers, and judges or juries. Ultimately, the task of the forensic scientist is not to decide what legal investigators, judges or jurors should believe, but to supply accurate and useful information to these decisionmakers. This chapter therefore concerns the task of translating laboratory measurements into statements that will assist legal factfinders in evaluating hypotheses about the events that are relevant in legal disputes. It introduces the likelihood ratio as a measure of the probative value of evidence in its own right and outlines the Bayesian framework for moving from data to beliefs in hypotheses. It examines common interpretive practices from this perspective and in light of the needs of the legal system.

Keywords: Bayes’ rule, data analysis, evidence, inference, interpretation, likelihood ratio, trace evidence

Suggested Citation

Kaye, David H., Interpretation (November 8, 2011). Encyclopedia of Forensic Sciences, J.A. Siegel & P.J. Saukko eds., Waltham: Academic Press, 2d ed. 2013, vol. 1, ch. 23, pp. 134-138, Available at SSRN: https://ssrn.com/abstract=2756238

David H. Kaye (Contact Author)

PSU - Penn State Law (University Park)

Lewis Katz Building
University Park, PA 16802
United States

HOME PAGE: http://www.personal.psu.edu/dhk3/index.htm

ASU - College of Law & School of Life Sciences ( email )

111 E Taylor St.
Phoenix, AZ 85004
United States

HOME PAGE: http://www.personal.psu.edu/dhk3/index.htm

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