Theses and Dissertations from UMD

Permanent URI for this communityhttp://hdl.handle.net/1903/2

New submissions to the thesis/dissertation collections are added automatically as they are received from the Graduate School. Currently, the Graduate School deposits all theses and dissertations from a given semester after the official graduation date. This means that there may be up to a 4 month delay in the appearance of a give thesis/dissertation in DRUM

More information is available at Theses and Dissertations at University of Maryland Libraries.

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2013 - 20152

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    Early Phonological Predictors of Toddler Language Outcomes
    (2015) Gerhold, Kayla; Bernstein Ratner, Nan; Hearing and Speech Sciences; Digital Repository at the University of Maryland; University of Maryland (College Park, Md.)
    Several studies have explored relationships between children's early phonological development and later language performance. This literature has included a more recent focus on the potential for early vocalization profiles in infancy to predict later language outcomes, including those characterized by delay or disorder. The present study examines phonetic inventories and syllable structure patterns in a large cohort of infants as they relate to expressive language outcomes at 2 years of age. Results suggest that as early as 11 months, phonetic inventory and mean syllable structure level are related to two year expressive language outcomes (MLU, MCDI, and types). If specific patterns of production can be established for a typically-developing population then this will additionally inform clinical decision-making. Possible applications are discussed.
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    PATTERNS AND POSSIBLE INFLUENCES OF MATERNAL VOWEL CLARIFICATION ON CHILD LANGUAGE DEVELOPMENT
    (2013) Hartman, Kelly Marie; Ratner, Nan B; Hearing and Speech Sciences; Digital Repository at the University of Maryland; University of Maryland (College Park, Md.)
    There have been many studies examining the differences between infant-directed speech (IDS) and adult-directed speech (ADS). However, very few longitudinal studies exist that explore how patterns of maternal vowel articulation in IDS change as children get older, or whether these changes have any effect on a child's developing language skills. This study examines the vowel clarification of mothers' IDS at 10-11 months, 18 months, and 24 months, as compared to their vowel production in ADS. Relationships between vowel space, vowel duration, and vowel variability and child language outcomes at 2 years are also explored. Results show that vowel space and vowel duration tend to be greater in IDS than in ADS, and that a mother's vowel space at 18 months is significantly related to expressive and receptive child language outcomes at 2 years. Possible explanations are discussed.