Method Validation of Sex Assessment from Skulls in Thai Population
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Abstract
Sex assessment is an important step for forensic anthropological examination. It is applied to the comparison of unidentified person and suspect person and useful for forensic identification. Method validation of sex assessment plays an important role in determination of the reliability from the results analysis. This study shows how to perform the method validation of the cranial sex assessment in Thai population. Samples were collected from 200 cases of unidentified bodies in charge of the Central Institute of Forensic Science, divided into 131 males and 69 females. According to the method of Ascadi and Nemeskeri (1970), five skull characteristics, nuchal crest, mastoid process, supraorbital margin, glabella and mental eminence, were mainly focused. The result of this study shows that the inexperience analyst (0-1 experience year) can correctly estimate the sex from the skull in the range of 72-74.5%. The analysts with more than 6 years of experience in human bone analysis can correctly estimate the sex from the skull in the range of 85.5-90%. The validity of the method was performed by inter-reliability between the analysts. The results revealed substantial levels of agreement. This can be concluded that the sex assessment of the skull from Ascadi and Nemeskeri (1970) method, studied in different population samples, can be used for the sex assessment from the Thai skull.
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