Optimal Iambs in Kashaya

This paper presents the three major ways that iambs play a role in Kashaya phonology: iambic lengthening, reshuffling of vowel length, and location of stress. Contrasting analyses of the phenomena are given in an ordered-rule Lexical Phonology approach and in constraint-based Optimality Theory. It is shown that only a nonderivational approach based on surface constraints succeeds in unifying the metrical motivation of lengthening and reshuffling. To account then for the location of stress without recourse to cyclicity, it is necessary to formalize analogy among output forms as a constraint on the uniform exponence of stress.