The DSP method in The Netherlands: Testing a mathematical approach for sex estimation on a post-medieval Dutch skeletal collection

Osteoarchaeological research is focused on profiling and understanding human remains of the past. The goal is to gather as much information as possible from the human remains. The first steps, and arguably the most important ones, are the estimation of sex, age and stature. These form the base of any osteoarchaeological research and help build a profile of the research population. The determination of an individual’s sex, age and stature will always be an estimation and can never be determined with 100% accuracy. This also means the process of building a profile is very time consuming. This difficulty is often exaggerated by the preservation of the human remains and methodology used. Osteoarchaeology also suffers greatly from inter and intraobserver variation. These problems become more severe when the sample size gets larger or when more traits are examined. Due to these problems, osteoarchaeological research can be very difficult and is never an exact science. Researchers are...Show moreOsteoarchaeological research is focused on profiling and understanding human remains of the past. The goal is to gather as much information as possible from the human remains. The first steps, and arguably the most important ones, are the estimation of sex, age and stature. These form the base of any osteoarchaeological research and help build a profile of the research population. The determination of an individual’s sex, age and stature will always be an estimation and can never be determined with 100% accuracy. This also means the process of building a profile is very time consuming. This difficulty is often exaggerated by the preservation of the human remains and methodology used. Osteoarchaeology also suffers greatly from inter and intraobserver variation. These problems become more severe when the sample size gets larger or when more traits are examined. Due to these problems, osteoarchaeological research can be very difficult and is never an exact science. Researchers are constantly trying to develop new methods to reduce the amount of time it takes to estimate sex, age and stature and to get the highest accuracy rates possible. For sex estimation, the skull and pelvis are regarded as the two most reliable aspects of the human skeleton. Several different methods have been developed focusing on these two aspects. New methods are often developed on a regional reference population. To implement such a method in a different region or country it is necessary to test its effectiveness on skeletal material with known data. In this thesis, a mathematical approach to sex estimation called the Diagnose Sexuelle Probabiliste method (DSP) is tested on a skeletal collection from the Middenbeemster, the Netherlands. Archival data was available for 118 individuals, of which 99 were eligible for the DSP method. The DSP method uses 4 to 10 measurements of the os coxa to estimate the chance of the individual being male or female. The big upside of this method, compared to other commonly used methods, is its ease of use. No extensive knowledge of the human skeleton is needed to gather the required measurement data for the method to be used. Even so, the creators of the method claim high accuracy levels and imply that DSP is equally, if not more, reliable than other existing methods. The results of this thesis indicate that, on Dutch populations, the DSP method is as accurate and robust as the creators claim. For the 99 individuals, DSP was able to estimate the sex of 85 of them (86%), with an accuracy of 97.6%. Only 2 individuals were incorrectly estimated to be male. From the measurements of the remaining 14 individuals the DSP method could not estimate the sex with enough certainty, leaving these individuals as undetermined. The DSP method proves to be robust and very accurate on Dutch skeletal material and should be considered a viable method for the estimation of sex. The ease of use of this method, compared to other sex estimation methods, is its strongest aspect. The method is not time consuming and can be performed without extensive knowledge on the subject, which could save a lot of time and effort in (osteo)archaeological research in the Netherlands.Show less

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The DSP method in The Netherlands: Testing a mathematical approach for sex estimation on a post-medieval Dutch skeletal collection