Title page for ETD etd-04112007-230312


Type of Document Master's Thesis
Author Courville, Valerie Jean
Author's Email Address vcourv1@lsu.edu
URN etd-04112007-230312
Title Rate Change Effects on Acoustic Duration Measures on an Adolescent Who Stutters
Degree Master of Arts (M.A.)
Department Communication Sciences & Disorders
Advisory Committee
Advisor Name Title
Paul Hoffman Committee Chair
Hugh Buckingham Committee Member
Jan Norris Committee Member
Keywords
  • linguistic complexity
  • fluency techniques
  • reduced rate
  • phonological coding
Date of Defense 2007-04-10
Availability unrestricted
Abstract
The purpose of this study was to determine if reduced rate techniques have an effect on speech motor coordination of an adolescent. A literature review revealed that a reduced rate technique consistently promoted more fluent speech; however, the cause of that increase in fluency is not known. This study proposed three specific questions to determine if there was a shortening of the /s/ phoneme in clustered contexts when compared to singletons, if reducing the rate would cause the adolescent to produce more adult-like shortening patterns, and if the reduced rate technique caused a decrease in stuttering events. One eleven year old participated in this study by repeating previously recorded sentences each containing the /s/ phoneme in either cluster or singleton context. The single subject design utilized an ABA treatment method.

Results indicated the reduced rate did have an affect on the length of the /s/ phoneme during the treatment phase; however, the treatment induced a lengthening of /s/ in SC contexts only. Since the length of /s/ in SC contexts increased and the length of /s/ in SV contexts remained the same, SC and SV /s/ durations were similar during phase B. This is not the adult-like shortening behavior we would expect. When the treatment method was removed during phase A2, the participant shortened /s/ in clusters in an adult-like manner. The number of stuttering events decreased dramatically with the reduced rate technique: 15 events during phase A1, 5 in B, and 3 in A2.

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