Does horizontal transmission invalidate cultural phylogenies?

Simon Greenhill, Thomas Currie, Russell Gray

    Research output: Contribution to journalArticle

    Abstract

    Phylogenetic methods have recently been applied to studies of cultural evolution. However, it has been claimed that the large amount of horizontal transmission that sometimes occurs between cultural groups invalidates the use of these methods. Here, we use a natural model of linguistic evolution to simulate borrowing between languages. The results show that tree topologies constructed with Bayesian phylogenetic methods are robust to realistic levels of borrowing. Inferences about divergence dates are slightly less robust and show a tendency to underestimate dates. Our results demonstrate that realistic levels of reticulation between cultures do not invalidate a phylogenetic approach to cultural and linguistic evolution.
    Original languageEnglish
    Pages (from-to)2299-2306
    JournalProceedings of the Royal Society of London Series B: Biological Sciences
    Volume276
    Issue number1665
    DOIs
    Publication statusPublished - 2009

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