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There's No Percentage in It: Intersite Spatial Analysis of Bushman (San) Pottery Decorations

Published online by Cambridge University Press:  20 January 2017

Rosanna Ridings  and
C. Garth Sampson
Rosanna Ridings
Affiliation:
Department of Anthropology, Southern Methodist University, Dallas, TX 75275
C. Garth Sampson
Affiliation:
Department of Archaeology, University of Witwatersrand, P.O. WITS, Johannesburg 2050, South Africa, and Department of Anthropology, Southern Methodist University, Dallas, TX 75275
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Abstract

Grass-tempered bowls made by the forbears of historical Karoo Bushmen between ca. A.D. 1500 and 1800 were decorated with many different stamp-impressed motifs. Five of the seven observed motif groups appear to be distributed randomly across the 2,000 km2 study area in the upper Seacow River valley, South Africa. When their percentage frequencies per site cluster were mapped, however, localized concentrations appeared. The validity of the percentage concentrations is tested here by unconstrained cluster analysis, which is not subject to the closure effect. Also, several other tests, all avoiding the use of percentage frequency maps, are introduced as alternative ways to deal with unevenly distributed sites and scarce artifacts or traits unevenly distributed among the sites themselves. The results demonstrate that percentage-frequency mapping can produce occasionally spurious and misleading patterns. Because stratigraphic evidence is scarce and inconclusive, and direct dating of sherds has not yet been conducted, a test also is proposed for determining contemporaneity of motif groups.

Résumé

Résumé

Los cuencos con desgrasante de paja hechos por los antepasados del grupo histórico Karoo Bushman durante 1500 a 1800 D.C., fueron decorados con diferentes motivos impresos con sellos. Cinco de los siete grupos de motivos observados parecen estar distribuídos al azar a través del área de estudio que comprende 2.000 km2 de la parte alta del valle del Río Seacow en Africa del Sur. Sin embargo, cuando sus frecuencias de porcentajes fueron mapeadas para cada grupo de sitios, aparecieron concentraciones localizadas. Este artículo examina la validez de dichas concentraciones de porcentajes a través de un análisis de grupos no restringidos, el cual no está sujeto a un efecto terminal (“closure effect”). Además, se introducen varias pruebas que evitan el uso de mapas de frequencias de porcentajes y que constituyen alternativas para tratar con sitios distribuídos de manera desigual y con escasos artefactos o rasgos desigualmente distribuídos entre los sitios mismos. Los resultados demuestran que los mapas de frecuencias de porcentajes pueden producir ocasionalmente patrones erróneos. Debido a que la evidencia estratigráfica es escasa e inconclusa, y que la datación directa de tiestos cerámicos aún no se ha producido, se propone una prueba para determinar la contemporaneidad de los motivos.

Type
Reports
Information
American Antiquity , Volume 55 , Issue 4 , October 1990 , pp. 766 - 780
Copyright
Copyright © The Society for American Archaeology 1990

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References

References Cited

Aitchison, J. 1981 A New Approach to Null Correlations of Proportions. Mathematical Geology 13: 175–189.Google Scholar
Aitchison, J. 1982 The Statistical Analysis of Compositional Data. Journal of the Royal Statistical Society 44(B): 139–177.Google Scholar
Aitchison, J. 1984 Reducing the Dimensionality of Compositional Data Sets. Mathematical Geology 16: 617–635.CrossRefGoogle Scholar
Anderberg, M. R. 1973 Cluster Analysis for Applications. Academic Press, New York.Google Scholar
Burchell, W. J. 1822 Travels in the Interior of Southern Africa, vol. 2. Batchworth Press, London.Google Scholar
Chayes, F. 1971 Ratio Correlation: A Manual for Students of Petrology and Geochemistry. University of Chicago Press, Chicago.Google Scholar
Chayes, F., and Kruskal, W. 1966 An Approximate Statistical Test for Correlation Between Two Proportions. Journal of Geology 74: 692–702.Google Scholar
Conkey, M. W. 1989 Review of Stylistic Boundaries Among Mobile Hunter-Foragers by C. G. Sampson. Science 244: 115.Google Scholar
Davis, J. C. 1973 Statistics and Data Analysis in Geology. Wiley and Sons, New York.Google Scholar
Dunn, E. J. 1931 The Bushman. Charles Griffin, London.Google Scholar
Godee Molsbergen, E. C. 1932 Reizen in Zuid Africa in de Hollandse Tijd, Vierde Deel: Tochten in het Kafferland 1776-1805. Martinus Nijhoff, s'Gravenhage.Google Scholar
Hart, T. J. G. 1989 Haaskraal and Volstruisfontein: Later Stone Age Events at Two Rockshelters in the Zeekoe Valley, Great Karoo, South Africa. Unpublished Master's thesis, Department of Archaeology, University of Cape Town.Google Scholar
Lichtenstein, H. 1967 Reisen in Sudlichen Afrika 1803-06, vol. 2. F. A. Brockhaus, Stuttgart.Google Scholar
Kannemeyer, D. R. 1890 Stone Implements of the Bushmen. Cape Illustrated Magazine 1: 120–130.Google Scholar
Mossop, E. E. 1935 The Journal ofHendrik Jacob Wikar. Van Riebeeck Society, Cape Town.Google Scholar
Parkington, J. E. 1972 Seasonal Mobility in the Late Stone Age. African Studies 31. 224–243.Google Scholar
Parkington, J. E. 1984 Changing Views of the Later Stone Age of South Africa. In Advances in World Prehistory, edited by Wendorf, F. and Close, A. E., vol. 3, pp. 90–142. Academic Press, New York.Google Scholar
Sampson, C. G. 1984 Site Clusters in the Smithfield Settlement Pattern. South African Archaeological Bulletin 39: 5–23.Google Scholar
Sampson, C. G. 1985 Atlas of Stone Age Settlement in the Central and Upper Seacow Valley. Memoir No. 18. National Museum, Bloemfontein, Republic of South Africa.Google Scholar
Sampson, C. G. 1988a Stylistic Boundaries Among Mobile Hunter-Foragers. Smithsonian Institution Press, Washington D. C. Google Scholar
Sampson, C. G. 1988b Putting the Wind Up the Smithfield: Season of Occupation Inferred for Sub-Recent Bushman Surface Sites. In Culture and Environment of the Late Quaternary of Africa, edited by Bower, J. and Lubell, D., pp. 207–235. BAR International Series 405. British Archaeological Reports, Oxford.Google Scholar
Sampson, C. G., and Bousman, B. 1985 Variations in the Size of Archaeological Surface Sites Attributed to the Seacow River Bushmen. South African Journal of Science 81: 321–323.Google Scholar
Sampson, C. G., Hart, T., Wallsmith, D. L., and Blagg, J. D. 1989 The Ceramic Sequence in the Upper Seacow Valley: Problems and Implications. South African Archaeological Bulletin 44: 3–16.CrossRefGoogle Scholar
Spath, H. 1980 Cluster Analysis Algorithms for Data Reduction and Classification ofObjects. Ellis Horwood, Chichester, England.Google Scholar
Veldman, D. J. 1967 FORTRAN Programming for the Behavioral Sciences. Holt, Rinehart and Winston, New York.Google Scholar
Ward, J. H., Jr. 1963 Hierarchical Grouping to Optimize an Objective Function. Journal of the American Statistical Association 58: 236–244.Google Scholar
Whallon, R., Jr. 1984 Unconstrained Clustering for the Analysis of Spatial Distributions in Archaeology. In Intrasite Spatial Analysis in Archaeology, edited by Hietala, H. J. and Larson, P. A., Jr., pp. 242–277. Cambridge University Press, New York.Google Scholar
Wiessner, P. W. 1983 Style and Social Information in Kalahari San Projectile Points. American Antiquity 50: 160–166.Google Scholar