Mechanism of sound change in Optimality Theory

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Abstract
In this article I examine the ongoing loss of palatalization assimilation in Modern Standard Russian within the framework of Optimality Theory (OT) (McCarthy & Prince, 1993a; Prince & Smolensky, 1993) and show that this theory offers new, meaningful explanations for the role of markedness and naturalness in the mechanism of a sound change. I also argue that OT provides new possibilities for relating quantitative patterns to the formal principles of grammatical organization. In particular, in OT, suggested cross-linguistically invariant relations between phonological factors predict a general pattern of influence that these factors have on the quantitative outcome of a change. I suggest that a change operates as a gradual weakening or strengthening of whole subhierarchies of constraints with universally fixed rankings (constraint families, which implement markedness scales in OT). In an examination of variable data, I argue that the major differences in quantitative patterns mirror the fixed constraint ranking within such constraint families and constraint violation/nonviolation in OT grammar. I also discuss the problem of modeling variable data within OT, which, like other formal phonological theories, permits no output variation. I examine a grammar competition model explored in OT literature and argue instead for constraint competition with constraint weight in production.

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