Paper: Finding Cognate Groups Using Phylogenies

ACL ID P10-1105
Title Finding Cognate Groups Using Phylogenies
Venue Annual Meeting of the Association of Computational Linguistics
Session Main Conference
Year 2010
Authors

A central problem in historical linguistics is the identification of historically related cognate words. We present a generative phylogenetic model for automatically in- ducing cognate group structure from un- aligned word lists. Our model represents the process of transformation and trans- mission from ancestor word to daughter word, as well as the alignment between the words lists of the observed languages. We also present a novel method for sim- plifying complex weighted automata cre- ated during inference to counteract the otherwise exponential growth of message sizes. On the task of identifying cognates in a dataset of Romance words, our model significantly outperforms a baseline ap- proach, increasing accuracy by as much as 80%. Finally, we demonstrate that our au- tomatically induce...