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NCJ Number: 249339 Find in a Library
Title: Variability in Likelihood Ratios due to Different Mechanisms
Journal: Forensic Science International - Genetics  Volume:14  Dated:January 2015  Pages:187-190
Author(s): Jo-Anne Bright; Kate E. Stevenson; James M. Curran; John s. Buckleton
Date Published: January 2015
Page Count: 4
Sponsoring Agency: National Institute of Justice (NIJ)
Washington, DC 20531
Grant Number: 2011-DN-BX-K541
Document: HTML
Type: Report (Grant Sponsored); Report (Study/Research); Research (Applied/Empirical)
Format: Article; Document (Online)
Language: English
Country: United States of America
Annotation: This study explored the size of the Markov chain Monte Carlo techniques (MCMC) variability within the interpretation software STRmix™ compared to other sources of variability in forensic DNA profiling, including PCR, capillary electrophoresis load and injection, and the makeup of allele frequency databases.
Abstract: The MCMC variability within STRmix™ was shown to be the smallest source of variability in this process. Recently there has been a drive towards standardization of forensic DNA interpretation methods resulting in the uptake of probabilistic interpretation software. Some of these software solutions use MCMC. They will not produce an identical answer after repeat interpretations of the same evidence profile because of the Monte Carlo aspect. This is a new source of variability within the forensic DNA analysis process. (Publisher abstract modified)
Main Term(s): Forensic sciences
Index Term(s): Comparative analysis; Computer software; DNA Typing; Mathematical modeling; NIJ grant-related documents; NIJ Resources; Probabilistic evidence; Suspect identification
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