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Published online by Cambridge University Press: 12 March 2026
This paper reports on the results of a detailed empirical study of word order correlations, based on a sample of 625 languages. The primary result is a determination of exactly what pairs of elements correlate in order with the verb and object. Some pairs of elements that have been claimed to correlate in order with the verb and object do not in fact exhibit any correlation. I argue against the Head-Dependent Theory (HDT), according to which the correlations reflect a tendency towards consistent ordering of heads and dependents. I offer an alternative account, the Branching Direction Theory (BDT), based on consistent ordering of phrasal and nonphrasal elements. According to the BDT, the word order correlations reflect a tendency for languages to be consistently right-branching or consistently left-branching.
The research for this paper was supported by Social Sciences and Humanities Research Council of Canada Research Grants 410–810949, 410–830354, and 410–850540 and by National Science Foundation Research Grant BNS-9011190. Versions of this paper have been delivered at the Max Planck Institut für Psycholinguistik in Nijmegen (The Netherlands), the University of Alberta, Stanford University, UCLA, UC San Diego, SUNY at Buffalo, and the University of Toronto. I am indebted to comments from the audiences at those talks. I also acknowledge useful discussion with and/or comments from Lyn Frazier, Jack Hawkins, Karin Michelson, Edith Moravcsik, Johanna Nichols, Tim Stowell, Robert Van Valin, Lindsay Whaley, and David Wilkins. The Korean data cited is due to Sea-eun Jhang, the Hausa data to Mahamane L. Abdoulaye.