Analysis and Discussion on Calculating Likelihood Ratio of DNA Mixture
Author(s): LIU Ying, REN He, GAO Lin-lin, SHI Yan, CHEN Chong, LIU Ya-cheng
Pages: 441-444
Year: 2015 Issue: 6
Journal: Journal of Forensic Medicine
Keyword: forensic genetics; statistics; likelihood ratio; mixture samples;
Abstract: Objective To analyze and discuss four methods of calculating likelihood ratio of DNA mixture. Methods In the case with CNAS-T0757 proficiency testing in 2013, the likelihood ratios were calculated and compared among four methods, including unrestricted combinatorial method, Clayton’s method, p2 principle method, and recommendations fromISFG . Results The likelihood ratios were maximumby Clayton’s method and recommendations fromISFG , followed by result of the unrestricted combinational method. The minimu mlikelihood ratio was obtained by p2 principle. Conclusion The unrestricted combi-national method could give furthest consideration to both information preservation and appraiser protection.
Pages: 441-444
Year: 2015 Issue: 6
Journal: Journal of Forensic Medicine
Keyword: forensic genetics; statistics; likelihood ratio; mixture samples;
Abstract: Objective To analyze and discuss four methods of calculating likelihood ratio of DNA mixture. Methods In the case with CNAS-T0757 proficiency testing in 2013, the likelihood ratios were calculated and compared among four methods, including unrestricted combinatorial method, Clayton’s method, p2 principle method, and recommendations fromISFG . Results The likelihood ratios were maximumby Clayton’s method and recommendations fromISFG , followed by result of the unrestricted combinational method. The minimu mlikelihood ratio was obtained by p2 principle. Conclusion The unrestricted combi-national method could give furthest consideration to both information preservation and appraiser protection.
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