UCLA Working Papers in Linguistics, vol.0, June 2000 Papers in Lakhota—Munro (ed.) THE PRODUCTIVITY OF INFIXATION IN LAKHOTA* ADAM ALBRIGHT
[email protected] A growing body of work on morphological irregularity has shown that the productivity of irregular morphological processes is sensitive to phonological context. However, these studies have focused almost exclusively on patterns of irregularity found in European languages. In this paper, I discuss a typologically different pattern of irregularity found in Lakhota: person marking appears as a prefix for some verbs, and as an infix for others. I combine computational modeling of the Lakhota lexicon and an experimental “wug” test, to show that infixed person marking is highly sensitive to context, just like other types of morphological irregularity. 1. INTRODUCTION It is not uncommon in the world’s languages for a particular morpheme to surface variably as an infix or as a prefix/suffix. One of the insights of McCarthy and Prince (1993), further developed in the OT literature, is that the decision to infix is often driven by prosodic considerations in the phonology. For example, possessive markers in Ulwa are placed after the first foot of the root, with the result that they are infixed in roots that are longer than one foot, and suffixed in words which contain just one foot. A second consideration which can drive infixation is syllable structure. An example of this is the morphemes -um- and -in- in Tagalog, which are prefixed to vowel-initial roots, but infixed in consonant-initial roots to create CV syllables and avoid VC syllables.