Does Lateral Transmission Obscure Inheritance in Hunter-Gatherer Languages?
Does Lateral Transmission Obscure Inheritance in Hunter-Gatherer Languages? Claire Bowern1*, Patience Epps2, Russell Gray3, Jane Hill4, Keith Hunley5, Patrick McConvell6, Jason Zentz1 1 Department of Linguistics, Yale University, New Haven, Connecticut, United States of America, 2 Department of Linguistics, University of Texas at Austin, Austin, Texas, United States of America, 3 Department of Psychology, University of Auckland. Auckland, New Zealand, 4 School of Anthropology, University of Arizona, Tucson, Arizona, United States of America, 5 Department of Anthropology, University of New Mexico, Albuquerque, New Mexico, United States of America, 6 College of Arts and Social Sciences, Australian National University, Canberra, Australia Abstract In recent years, linguists have begun to increasingly rely on quantitative phylogenetic approaches to examine language evolution. Some linguists have questioned the suitability of phylogenetic approaches on the grounds that linguistic evolution is largely reticulate due to extensive lateral transmission, or borrowing, among languages. The problem may be particularly pronounced in hunter-gatherer languages, where the conventional wisdom among many linguists is that lexical borrowing rates are so high that tree building approaches cannot provide meaningful insights into evolutionary processes. However, this claim has never been systematically evaluated, in large part because suitable data were unavailable. In addition, little is known about the subsistence, demographic, ecological, and social factors that might mediate variation in rates of borrowing among languages. Here, we evaluate these claims with a large sample of hunter-gatherer languages from three regions around the world. In this study, a list of 204 basic vocabulary items was collected for 122 hunter-gatherer and small-scale cultivator languages from three ecologically diverse case study areas: northern Australia, northwest Amazonia, and California and the Great Basin.
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