Speaker: Ezer Rasin (MIT)
Title: Severing stress from phonology
Date/Time: Thursday, April 13th, 12:30-1:50pm
According to the consensus view in generative linguistics, the cognitive module known as ‘phonology’ is responsible for various phonological computations, including the computation of word stress, tone, and segmental processes. I will present two differences between stress and segmental phonology to motivate a modular decomposition of phonology, where the computation of stress is carried out in a separate module with a limited interaction with the rest of phonology:
1) Information Encapsulation: drawing on observations by de Lacy (2006) and Blumenfeld (2006), I propose a universal asymmetry between stress and segmental processes. Segmental processes are often sensitive to the position of stress (In American English, for example, [t] is flapped between a preceding stressed vowel and a following unstressed vowel, as in políDical vs. politícian) but the computation of stress is never directly sensitive to segmental information: stress patterns like ‘stress the rightmost vowel followed by a velar’ are unattested, and can be excluded in the modular architecture if the input to the stress module excludes representations of segmental features.
2) Weak Generative Capacity: Heinz (2014) observes that the computational complexity of attested stress patterns goes beyond that of segmental patterns. In particular, stress patterns can require exactly one primary stress per word, but segmental patterns that require exactly one e.g. sibilant per word are unattested. This difference places stress and segmental phonology in two different domains of the Chomsky hierarchy of formal languages, a hallmark of modularity.