The 82nd Annual Meeting of the American Association of Physical Anthropologists (2013)

The Determination of Sex and Ancestry of Patellae and Calcanei from the Hamann-Todd Anatomical Collection



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At times, physical anthropologists are requested by law enforcement agencies to construct a biological profile which will assist in the personal identification of an unknown individual. Key factors of the biological profile are sex and ancestry. Few U.S.-based osteological studies concerning the determination of sex or ancestry focus on patellae or calcanei, despite the high incidence of recovery of these bones from crime scenes. This poster discusses the first U.S-based study which combines both the examination of sex and ancestry with measurements obtained from individuals from a well-documented osteological collection. Data was collected from 221 individuals from the Hamann-Todd Osteological Collection at the Cleveland Museum of Natural History, Cleveland, Ohio, and was analyzed by SPSS v. 20. The 12 discriminant functions generated can provide investigators with reliable methods that can be used to aid in the construction of a biological profile using either whole or incomplete patellae and/or calcanei of an individual. Functions were created using all variables as equal for cases where all measurements are able to be collected from each bone. Stepwise analysis was conducted to determine which measurements are best utilized when analyzing bones which may be only partially intact. This study shows that sex can be correctly determined for 80.8% of females and 87.1% of males, with a total sexing accuracy rate of 83.7% for all individuals. Also, ancestry can be correctly determined in 77.7% of American blacks and 74.3% of American whites, with a total accuracy rate of 76.0% for all individuals.

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