With a rising interest in North American Indian ethnohistorical demography, it is essential that data be evaluated for accuracy before they can be used to test hypotheses or make generalizations. This paper considers selected methods of evaluation of the accuracy of total population, sex, and age data which were employed in research on the ethnohistorical demography of the Pima and Maricopa Indians of central Arizona. Some methods, such as testing for the probability of chance occurrence of a sex ratio and cohort survival analysis, were found useful, while other methods, such as Whipple's Index, were found to be of little value. Also considered is the utility of these methods for further studies of Native North American ethnohistorical demography. Among ethnohistorians, there has been an increasing interest in studies of Native North American population, especially since Dobyns's (1966) hemispheric survey. In a card file of publications which am keeping on this subject, have found twenty-two from 1950-1954, forty-four from 1960-1964, and eighty-eight from 1970-1974, a doubling each ten years. This is a welcome reversal from an earlier era, when such studies were not only unfashionable but even a bit unrespectable. Although there were exceptions such as Sherbume F. Cook, earlier population studies that were made often ignored data which investigators knew to exist. This approach is well-exemplified by Pearl Beaglehole (1935:41), who, in presenting some Hopi population data, stated: I have not used the government census material because this, think, is of more than doubtful accuracy. Fortunately, this attitude has changed, and present-day ethnohistorians, whatever their discipline, have realized the tremendous potential for use of population data collected by colonial and national governments. However, in desiring to show results from the analysis of population data, it behooves all ethnohistorical demographers to carefully evaluate the accuracy of their data, lest critics return to the attitude expressed by Beaglehole. All population data are inaccurate to some degree, and for Native North Americans, this degree is usually quite large. Some recent studies have been less than meticulous in evaluating the accuracy of data which are then employed to test hypotheses or make generalizations about demographic history (e.g., Zubrow 1974). With the use of extensive data evaluation techniques, Native American population data can be more successfully employed, or so am convinced from my own work on the historical demography of the Pima and Maricopa Indians of central Arizona from 1846-1974 (Meister 1975, 1976, 1978). ETHNOHISTORY 27/2 (Spring 1980) 153 This content downloaded from 207.46.13.128 on Tue, 06 Sep 2016 06:06:10 UTC All use subject to http://about.jstor.org/terms
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