a b st r a c t 'Special reduction' refers to instances of extreme phonetic reduction which is restricted to particular words or phrases, usually grammaticalizing constructions ( going to > [gəɾə]), greetings ( hi from how are you ), discourse markers (Spanish o sea > sa ), or other sequences that are often used together. On the basis of data from English, Brazilian Portuguese, and Colombian Spanish, we argue that special reduction is based on the general phonetic tendencies in the language, but that these tendencies are carried to an extreme where word sequences are used with high frequency and become chunked, allowing formerly stressed syllables to lose stress and reduce. The data also show that special reduction takes place gradually over time, and refl ects general patterns of change seen in the history of the language. In fact, in some examples, special reduction presages more general sound changes that occur later. We argue that the gradual phonetic changes that accumulate for particular words or phrases, eventually changing them dramatically, requires an exemplar model for the phonological representation of words and phrases, which is updated continually as sequences are used and aff ected by reductive phonetic processes.k e y w o r d s : phonetic reduction , phonological change , frequency eff ects , chunking , exemplar models .[ * ] We would like to thank Earl Brown and Sarah Peceny for their work on the Colombian data, Chris Koops for his discussion on the gradient modeling of vowel formant transitions, Naomi Shin for giving feedback on the Spanish section, and Heliana Mello for drawing our attention to the C-Oral Brasil corpus. b y b e e e t a l . 422
IntroductionIt has sometimes been assumed that lexically restricted phenomena are of less interest to linguists and less revealing than phenomena that make up the more general and more regular core of the structure of a language. One contribution of cognitive and usage-based approaches has been to demonstrate that even restricted, lexically determined constructions reveal the same processing mechanisms that operate in more general constructions. In this paper, we turn the spotlight on phonological phenomena that at fi rst blush seem to be irregular, 'special', and outside the mainstream phonological trends -the extreme reduction that very frequent phrases and words undergo. Our argument rests on the fact that such reduction occurs in ongoing language use, and therefore turns out to provide evidence for the cognitive processes that shape phonology and grammar. We argue specifi cally that special reduction is one end of a continuum of interaction between the normal phonetic processes that occur in automated production and the frequency of use of words and phrases in particular contexts. The importance of special reduction to comprehension and production can be demonstrated with the example of the words can and can't . These two auxiliaries both undergo some reductive processes which help to keep them distinct. Can reduces by the change of the sequence [aen]...