Intersecting formatives and inflectional predictability: How do speakers and learners predict the correct form of Murrinhpatha verbs?

Abstract

This article investigates the phenomenon of inflection by intersecting formatives, that is to say, where an exponence is encoded by a combination of independently distributed phonological increments. Formative independence is defined in terms of conditional entropy. The verb inflection system of Murrinhpatha, an Aboriginal language of northern Australia, is analysed as a particularly complex example of intersecting formatives, and in general we can say that inflectional exponence in this language is highly irregular or unpredictable. Recent information-theoretic approaches to morphology provide us with methods for formalising and measuring the unpredictability of Murrinhpatha verb inflection..