The Power of Exclusion using Automated Osteometric Sorting: Pair‐Matching, |
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| Authors: | Jeffrey James Lynch MSc John Byrd PhD Carrie B LeGarde MA |
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| Affiliation: | 1. Defense POW/MIA Accounting Agency, Offutt AFB, NE;2. Defense POW/MIA Accounting Agency, Joint Base Pearl Harbor‐Hickam, HI |
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| Abstract: | This study compares the original pair‐matching osteometric sorting model (J Forensic Sci 2003 ;48:717) against two new models providing validation and performance testing across three samples. The samples include the Forensic Data Bank, USS Oklahoma, and the osteometric sorting reference used within the Defense POW/MIA Accounting Agency. A computer science solution to generating dynamic statistical models across a commingled assemblage is presented. The issue of normality is investigated showing the relative robustness against non‐normality and a data transformation to control for normality. A case study is provided showing the relative exclusion power of all three models from an active commingled case within the Defense POW/MIA Accounting Agency. In total, 14,357,220 osteometric t‐tests were conducted. The results indicate that osteometric sorting performs as expected despite reference samples deviating from normality. The two new models outperform the original, and one of those is recommended to supersede the original for future osteometric sorting work. |
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| Keywords: | forensic science osteometric sorting pair‐matching commingling t‐test normality fluctuating asymmetry |
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