The effects of auditory feedback on articulation in normal speakers and speakers who stutter.
Item
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Title
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The effects of auditory feedback on articulation in normal speakers and speakers who stutter.
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Identifier
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AAI9959221
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identifier
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9959221
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Creator
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Ross, Dorothy Ellen.
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Contributor
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Adviser: Vincent L. Gracco
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Date
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2000
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Language
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English
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Publisher
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City University of New York.
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Subject
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Health Sciences, Speech Pathology
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Abstract
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Five CVC words in a carrier phrase were read by five stutterers and five nonstutterers under six conditions: (1) no alteration in auditory feedback; (2) frequency altered feedback one-half octave lower; (3) frequency altered feedback one-half octave higher; (4) delayed auditory feedback of 50 ms.; (5) 85 dB pink noise; and (6) self-monitoring under noise. Under the control condition, stutterers had longer phrase, voicing, and movement durations, and lower peak velocity than the normal speakers. The variability of duration, distance, displacement, and peak velocity was higher among the stutterers than nonstutterers. The stutterers had less horizontal differentiation between /s/ and /∫/ than the nonstutterers. Tongue position was lower for the consonants and higher for the vowels among the stutterers. Under the experimental conditions, both groups increased acoustic and movement duration, decreased peak velocity, and positioned vowels and consonants higher. The variability of movement duration increased in both groups, while the variability of displacement and peak velocity decreased in both groups, However, except for horizontal position of /s, ∫/, the variability of the stutterers remained higher than that of the normal speakers for all variables under all conditions. Changes were more consistent within subjects than within conditions.
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Type
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dissertation
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Source
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PQT Legacy CUNY.xlsx
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degree
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Ph.D.
