Journal of Northeast Texas Archaeology
This article represents supplementary data highlighting the specifics of date combination and the subsequent production of summed probability distribution samples for Caddo sites in East Texas. All radiocarbon (14C) dates employed in this effort were collected from research and cultural resource management (CRM) reports and publications, synthesized, then recalibrated in version 4.1.7 of OxCal using IntCal09.
The raw sample of Caddo 14C dates (n=889, with a standard deviation of 58) exceeds the minimum number of dates-750 suggested by Michczynska and Pazdur and 500 by Williams - but the combined sample (n=407, with a standard deviation of 53) does not meet the required minimum number of dates necessary to achieve significance. However, the distilled sample of 407 dates reduces probability bias introduced by sites with large numbers of 14C dates, and provides a more accurate representation of the temporal character for sites with ~10 14C dates.
Selden, Robert Z. Jr. and Perttula, Timothy K.
"Temporal Dynamics of East Texas Caddo Sites with 10 or More Radiocarbon Dates,"
Index of Texas Archaeology: Open Access Gray Literature from the Lone Star State: Vol. 2013
, Article 30. https://doi.org/10.21112/.ita.2013.1.30
Available at: https://scholarworks.sfasu.edu/ita/vol2013/iss1/30
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