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    The Minimal Word Hypothesis: A Speech Segmentation Strategy

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    Author
    Meador, Diane L.
    Issue Date
    1996
    Keywords
    minimal word
    speech segmentation
    word spotting
    Linguistics
    lexical access
    Advisor
    Hammond, Michael
    
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    Show full item record
    Publisher
    The University of Arizona.
    Rights
    Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
    Abstract
    Previous investigations have sought to determine how listeners might locate word boundaries in the speech signal for the purpose of lexical access. Cutler (1990) proposes the Metrical Segmentation Strategy (MSS), such that only full vowels in stressed syllables and their preceding syllabic onsets are segmented from the speech stream. I report the results of several experiments which indicate that the listener segments the minimal word, a phonologically motivated prosodic constituent, during processing of the speech signal. These experiments were designed to contrast the MSS with two prosodic alternative hypotheses. The Syllable Hypothesis posits that listeners segment a linguistic syllable in its entirety as it is produced by the speaker. The Minimal Word Hypothesis proposes that a minimal word is segmented according to implicit knowledge the listener has concerning statistically probable characteristics of the lexicon. These competing hypotheses were tested by using a word spotting method similar to that in Cutler and Norris (1988). The subjects' task was to detect real monosyllabic words embedded initially in bisyllabic nonce strings. Both open (CV) and closed (CVC) words were embedded in strings containing a single intervocalic consonant. The prosodic constituency of this consonant was varied by manipulating factors affecting prosodic structure: stress, the sonority of the consonant, and the quality of the vowel in the first syllable. The assumption behind the method is that word detection will be facilitated when embedded word and segmentation boundaries are coincident. Results show that these factors are influential during segmentation. The degree of difficulty in word detection is a function of how well the speech signal corresponds to the minimal word. Findings are consistently counter to both the MSS and Syllable hypotheses. The Minimal Word Hypothesis takes advantage of statistical properties of the lexicon, ensuring a strategy which is successful more often than not. The minimal word specifies the smallest possible content word in a language in terms of prosodic structure while simultaneously affiliating the greatest amount of featural information within the structural limits. It therefore guarantees an efficient strategy with as few parses as possible.
    Type
    text
    Electronic Dissertation
    Degree Name
    Ph.D.
    Degree Level
    doctoral
    Degree Program
    Graduate College
    Linguistics
    Degree Grantor
    University of Arizona
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