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    Orthographic Influences on Sublexical Processing

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    Author
    Suddarth, Rachael
    Issue Date
    2011
    Keywords
    learning disability
    literacy
    Orthographic Consistency Effect
    Sublexical
    Speech, Language, & Hearing Sciences
    adults
    language impairment
    Advisor
    Plante, Elena
    
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    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
    Adults with language impairment have poor language skills, but may or may not have reading deficits. For those identified with literacy difficulties as children, deficits in the skills related to sublexical level decoding skills can persist into adulthood. Decoding deficits, current or remediated, would implicate the sublexical interaction of orthography and phonology. In addition, the heterogeneous reading profiles of adults with language impairment provide an opportunity to examine whether the deficits in this bidirectional link between orthography and phonology are related to reading deficit specifically or language impairment globally. Sixty adults, 30 with language impairment and 30 with typical language, participated in this study. Nonword stimuli, orthogonally varied based on orthographic and phonological neighborhood density, were presented in two sublexical tasks, nonword repetition and nonword spelling. The experiment revealed a pattern of similar responses for adults with and without language impairment. However, adults with impaired language had significantly poorer performance on both the nonword repetition task and the nonword spelling task. Additional analyses indicated that both language and literacy measures predicted the overall performance on the orthogonally varied nonword repetition and nonword spelling tasks. This study highlights the existence of a bidirectional influence between phonological and orthographic processing. For adults with language impairment it appears that this bidirectional link is intact at the sublexical level.
    Type
    text
    Electronic Dissertation
    Degree Name
    Ph.D.
    Degree Level
    doctoral
    Degree Program
    Graduate College
    Speech, Language, & Hearing Sciences
    Degree Grantor
    University of Arizona
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