Speech and Hearing Science Commons^™

Speech Motor Control In Younger And Older Adults: The Effect Of Age And Individual Differences On Speech Error Production, Katherine M. Dawson

Dissertations, Theses, and Capstone Projects

This dissertation investigates three main issues in speech motor control, all of which are explored through the lens of speech error production. The speech error elicitation task used is the alternating onset, identical coda (e.g. ‘top cop’) paradigm, which in this incarnation is executed in time to a rate-increasing metronome. The first experimental chapter asks why some speakers may be more prone to the production of speech errors than others, from an individual differences perspective. A number of speaker attributes are taken into account, including age (older and younger adults), performance on a subset of cognitive tasks, as well as …

Outcomes In Children With Additional Disabilities Following Cochlear Implantation: A Systematic Review, Rebecca M. Tuchman

Dissertations, Theses, and Capstone Projects

Background: Thirty percent of children with hearing loss have an additional disability. These children may be difficult to test according to standard audiologic behavioral test protocols. Additionally, progress within this population may present differently than in children with no additional disability. Currently, no evidence-based protocol exists for assessing cochlear implant benefit and outcomes in this population.

Objective: The purpose of this investigation is to perform a systematic review on the outcomes of cochlear implantation in children with additional disabilities. Specifically, this study focused on areas of function assessed, outcome measures used, and evidence of benefit observed.

Methods: A comprehensive search …

Effects Of Primary And Secondary Cigarette Smoke On Auditory Function: A Systematic Review, Hilary Mcmanus

Dissertations, Theses, and Capstone Projects

Objective: The goal of this paper was to systematically review literature in order to investigate the effects of active and passive cigarette smoke on auditory function when assessing outcome measures including pure tone audiometry, otoacoustic emissions, high-frequency audiometry, and auditory evoked potentials.

Methods: A comprehensive search using the Medline Complete database was conducted to identify relevant studies published after 2005. Inclusion criteria included the use of pure tone audiometry, high-frequency audiometry, otoacoustic emissions, and/or auditory evoked potentials to examine the effect of primary or secondary cigarette smoke. Studies involving noise exposure or other confounding factors were excluded.

Results: A total …

Screening For Hearing Loss: Physician Attitudes And Practice, Theresa N. Vitale

Dissertations, Theses, and Capstone Projects

Age related hearing loss (ARHL) is considered a public health hazard in large part due to the negative health outcomes with which it is associated, such as, cognitive decline, increased risk of falling, social isolation and depression. Despite the health-related costs of ARHL, physician’s rarely screen older adults for ARHL. Some of the reasons previously cited include a lack of time and resources in medical offices, a lack of reimbursement for such measures, or lack of knowledge of risk factors associated with hearing loss. The latter is problematic as improved communication among physicians and their patients is an important correlate …

Vowel Production In Down Syndrome: An Ultrasound Study, Micalle Carl

Dissertations, Theses, and Capstone Projects

The present study investigated the articulatory and acoustic characteristics of vowel production in individuals with Down syndrome (DS). Speech production deficits and reduced intelligibility are consistently noted in this population, attributed to any combination of phonological, structural, and/or motor control deficits. Speakers with DS have demonstrated impaired vowel production, as indicated by perceptual, acoustic, and articulatory data, with emerging evidence of vowel centralization. Participants in the study included eight young adults with DS, as well as eight age- and gender-matched controls. Ultrasound imaging was utilized to obtain midsagittal tongue contours during single-word productions, specifically targeting the corner vowels /ɑ/, /æ/, …

Otologic Blast Injuries, Michelle Singer

Dissertations, Theses, and Capstone Projects

The otologic system functions as a highly sensitive pressure transducer. Because of this, the ear is the most commonly affected organ in primary blast injury. Frequently encountered symptoms include hearing loss, tinnitus, and tympanic membrane perforations. The ear is repeatedly overlooked during triage and easily forgotten in subjects with multiple injuries after major catastrophic events such as explosions. This systematic review provides an overview of the most common otologic injuries observed after blast exposure in a variety of settings and populations. An analysis of 35 studies and an additional 23 reviews was performed in attempt to uncover patterns of otologic …

Associations Of The Medial Olivocochlear Reflex And Speech-In-Noise Abilities In Normal Hearing Adult Listeners: A Systematic Review, Imari J. Greaves

Dissertations, Theses, and Capstone Projects

This systematic review analyzed the research concerning the medial olivocochlear reflex (MOCR) and speech-in-noise abilities in normal hearing adult listeners. In an attempt to understand the underlying difficulties in this population, the following research questions were proposed: 1) Does the research indicate that the magnitude of MOC suppression measured via OAEs is related to a normal hearing subject’s ability to recognize speech-in-noise? 2) Are MOC effects measured via OAEs lateralized? Is there a right ear advantage as suggested by Khalfa, Morlet, Micheyl, Morgon & Collet (1997)? Ten studies met the standards for inclusion for this review. Analysis of the research …

Individual Differences In Stimulus Frequency Otoacoustic Emission Phase, Joshua J. Hajicek

Dissertations, Theses, and Capstone Projects

Otoacoustic emissions (OAEs) are sounds that originate in the cochlea and are measured in the ear canal. OAEs provide a noninvasive tool for investigating cochlear mechanics. Stimulus-frequency OAEs (SFOAEs) are evoked by presenting a single frequency tone, called a probe tone, which have an advantage over other OAEs because they are the least influenced by cochlear nonlinearities. However, because the SFOAE are generated in the cochlea with the same frequency as the stimulus, additional techniques, such as the use of suppressor tones are needed to enable separation of the probe tone from the SFOAE.

The primary goal of this investigation …

Cognitive And Neurobiological Degeneration Of The Mental Lexicon In Primary Progressive Aphasia, Jet M. J. Vonk

Dissertations, Theses, and Capstone Projects

The ease with which we use the thousands of words in our vocabulary stands in stark contrast to our difficulty establishing how they are organized in our mind and brain. The breakdown of language due to cortical atrophy in primary progressive aphasia (PPA) creates conditions to study this organization at a cognitive and neurobiological level in that the three variants of this disease, namely non-fluent, logopenic, and semantic PPA, each bear their own signature of language-specific decline and cortical atrophy. As the impaired regions in each variant are linked to different lexical and semantic attributes of words, lexical decision performance …

"Marie Manje La Pom Nan." Examining The Cognitive Process Of Restructuring And Advantage Selection In The Definite Article System In Haitian Creole Among U.S. Born Heritage Speakers Of Haitian Creole, Marie-Michelle Monéreau-Merry

Dissertations, Theses, and Capstone Projects

The distributional patterns of heritage speakers’ reanalyzed first language are often grammatically divergent from native speakers. Irrespective of the heritage language, there is converging evidence that the cognitive process of reanalysis of heritage languages is often evident in less salient properties of the language, such as inflectional morphology (Polinsky & Kagan, 2007). Therefore, Haitian Creole (HC) is a candidate for restructuring. In this investigation we compared the morphophonological patterns of the definite article system at the production and perception level between two groups of early learners of Haitian Creole (i.e. native speakers vs. United States (US) born heritage speakers).

The …

The Effect Of A Single Bout Of Physical Exertion On Expressive Language And Word Finding In Individuals With Multiple Sclerosis, Marissa A. Barrera

Dissertations, Theses, and Capstone Projects

To date, little research has been conducted on the relationship between fatigue and expressive language among Multiple Sclerosis patients (MS). This study was a response to this knowledge gap. A nonrandom, matched- subject, mixed-factor design model was used with a purposive sample of 17 individuals with MS (five had primary-progressive (PP) MS, and 12 had relapsing-remitting (RR) MS). The research design was subjected to pretesting to ensure validity. Participants were assessed on a range of language tasks after undergoing one bout of cardiovascular exercise (NuStep T5 Recumbent Cross Trainer) and asked to provide a subjective fatigue score. The expressive language …

Perception And Production Of /V/ And /W/ In Hindi Speakers, Vikas Grover

Dissertations, Theses, and Capstone Projects

This dissertation examines the ability of Hindi speakers to identify, discriminate and produce two English phonemes /v/ and /w/ which are difficult for Hindi speakers to distinguish. In Hindi, /v/ and /w/ are used interchangeably. This pattern of use has transferred to Indian English, resulting in English /v/ and /w/ words showing variable pronunciations (e.g., “whale” or “vale” for the word “whale”). Hindi speakers were asked to identify, discriminate and produce tokens of /v/ and /w/. This study also examined whether experience with American English, related to the length of residence (LOR) in the US affects Hindi listeners’ perception and …

Language-Mixing In Discourse In Bilingual Individuals With Non-Fluent Aphasia, Avanthi Paplikar

Dissertations, Theses, and Capstone Projects

Language-mixing (LM) as defined by Chengappa (2009, p. 417) is an “intra-sentential phenomenon referred to as the mixing of various linguistic units (morphemes, words, modifiers, phrases, etc.), primarily from two participating grammatical systems”. LM is influenced by grammatical, environmental, and social constraints (e.g., Milroy & Wei, 1995; Bhat & Chengappa, 2005). Researchers have suggested that LM in patients with aphasia is a communicative strategy used to achieve successful exchanges between speakers; the effectiveness of this mixing, however, had yet to be demonstrated quantitatively.

In the current study we investigated whether LM is present in bilingual speakers with aphasia, and if …

When Less Can Be More: Dual Task Effects In Stuttering And Fluent Adults, Naomi Nechama Eichorn

Dissertations, Theses, and Capstone Projects

The present study tested the counterintuitive hypothesis that engaging cognitive resources in a secondary task while speaking could benefit aspects of speech production. Effects of dual task conditions on speech fluency, rate, and error patterns were examined in stuttering and fluent speakers based on specific predictions derived from three related theoretical frameworks. Twenty fluent adults and 19 adults with confirmed diagnoses of stuttering participated in the study. All participants completed two baseline tasks: (1) a continuous speaking task in which spontaneous speech was produced in response to given prompts; and (2) a working memory (WM) task involving manipulations of WM …

Neurophysiological Indices Of The Effect Of Cognates On Vowel Perception In Late Spanish-English Bilinguals, Carol A. Tessel

Dissertations, Theses, and Capstone Projects

The field of research in bilingualism and second language (L2) acquisition has yielded overwhelming evidence that acquiring a second language later in life will result in less accurate production and perception of consonants and vowels in the second language. These effects, in part, are a result of interference from the already formed phonetic categories shaped by early exposure to the L1 (Iverson, 2007). Phonetic categories from the L2 will, at least initially, be mapped onto phonetic categories from the L1 (Flege, 1995). Shared storage of similar lexical items from L1 and L2 may also take place resulting in differences in …

Discrimination Of Tone Contrasts In Mandarin Disyllables By Naïve American English Listeners, Shari Salzhauer Berkowitz

Dissertations, Theses, and Capstone Projects

The present study examined the perception of Mandarin disyllabic tones by inexperienced American English speakers. Participants heard two naturally-produced Mandarin disyllables, and indicated if the two were the same or different. A small native Mandarin-speaking control group participated as well. All 21 possible Mandarin contrasts where the initial syllable varied but the final syllable stayed the same were tested. Acoustic analysis was performed on the stimuli under study. Mandarin subjects scored at ceiling on all contrasts. American English subjects performed poorly on contrasts where the difference in mean F0 was small, or where the difference in the offset F0 of …

Development Of Lexical Tone Production In Disyllabic Words By 2- To 6-Year-Old Mandarin-Speaking Children, Puisan Wong

Dissertations, Theses, and Capstone Projects

This study investigated children's development in the production of Mandarin lexical tones in familiar disyllabic words and tested the hypothesis that disyllabic tone contours with more complex fundamental frequency contours are more difficult for children to produce. Participants were forty-four 2- to 6-year-old monolingual Mandarin-speaking children and 12 mothers. Their disyllabic tone productions were elicited by picture naming and low-pass filtered to eliminate lexical information while retaining the fundamental frequency contours. Three Mandarin-speaking judges listened to the filtered stimuli, and categorized the children's and adult's disyllabic tones. Acoustic analysis was performed on selected accurate child and adult productions and on …

Markers Of Dyslexia In Adult Spanish-Speakers Who Report Severe Difficulty Learning English, Elizabeth Ijalba

Dissertations, Theses, and Capstone Projects

The relationship between native-language reading ability and second-language (L2) learning was explored in a cohort of 60 adult Spanish-speakers learning English as a second language. The research questions centered on whether underlying nativelanguage deficits associated with dyslexia would be present in a subset of English Language Learners who reported severe difficulty learning English. Our participants were divided into two education groups (below and above12th grade). These two groups were classified into three groups based on self- and teacher- ratings of ease or difficulty in English learning ability: for the high-education group, Poor English Language Learners (PELL, N=7); Good English Language …

Speech Perception And Lexical Effects In Specific Language Impairment: The Effects Of Vowel Duration And Word Knowledge On Perception Of Final Alveolar Stop Voicing, Frances L.V. Scheffler

Dissertations, Theses, and Capstone Projects

The perception of temporal speech cues, lexical knowledge, and their interactions were examined in children (6;0-9;6) with specific language impairment (SLI). An identification task was used to test four 12-step speech continua: word-word (FEET—FEED), nonword-nonword (ZEST—ZEED), word-nonword (CHEAT—CHEED) and nonword-word (REAT—READ). The stimuli were naturally recorded and digitally edited. The vowel steady state, which varied in duration from 110 to 350 milliseconds in 20-millisecond steps, was the acoustic cue to the voicing characteristic of the final consonant in each stimulus. The analyses revealed that both the TLD and SLI groups used vowel duration as a perceptual cue. For the word-word …

The Contribution Of Interaural Intensity Differences To The Horizontal Auditory Localization Of Narrow Bands Of Noise, Matthew H. Bakke

Dissertations, Theses, and Capstone Projects

Brief bursts of third-octave bands of noise (center frequencies at 0.5, 1.0, 2.0 and 4.0 kHz) and band pass noises with different degrees of low-frequency content (0.5 to 4.0 kHz, 1.0 to 4.0 kHz and 2.0 to 4.0 kHz) were recorded binaurally from 17 different horizontal locations (90 degrees on the left to 90 degrees on the right in 11.25 degree steps) one meter from the ears of an anthropomorphic mannequin (KEMAR) in an anechoic room and a reverberant room. The recorded sounds were processed by attenuating or removing interaural intensity differences and presented to five normally hearing subjects through …

Use Of Verb Inflections In The Oral Expression Of Agrammatic Spanish-Speaking Aphasics, Jose Gregorio Centeno

Dissertations, Theses, and Capstone Projects

Studies on agrammatic verb errors have basically addressed the production of verb forms as whole lexical units without looking at their inflectional affixes. There has been limited research assessing the possible role of the variables encapsulated in verbal inflections in verb access and retrieval. The purpose of this investigation was to, first, address the possible factors causing a hierarchy of sparing in Spanish verb inflections, and, second, extend the explanatory factors proposed by earlier cross-linguistic investigations on verb inflectional performance by agrammatic speakers. This investigation studied the production of verb inflections by agrammatic Spanish speakers in a sentence repetition task. …

Automatic And Controlled Information Processing In Alzheimer's Disease, Linda S. Carozza

Dissertations, Theses, and Capstone Projects

This research investigation explored the cognitive processing operations of 18 healthy elderly (HE) subjects and 12 Alzheimer's Disease (AD) subjects in the mild clinical stage of the disease in their performance on a semantic priming task involving semantic lexical activations of both automatic and controlled processing natures.

Relatively little conclusive evidence has been documented regarding the relative roles of attention and memory processing in the lexical-semantic impairment of Alzheimer's Disease. A lexical decision processing task was implemented to investigate the effects of normal aging and neuropathological damage of Alzheimer's Disease on subjects' semantic priming abilities. The research design was based …

Parsing Routines In Syntactic Processing: The Effect Of Expected Word Order On Sentence Comprehension, Ann Dibella Jablon

Dissertations, Theses, and Capstone Projects

Two experiments were conducted to test the SVO Expectancy Hypothesis. This hypothesis embodies three claims: (a) the syntactic parsing device has an initial expectation for the SVO (syntactically defined) structure, (b) the parser reads or tracks the syntactic information in the utterance to confirm or adjust its predictions, and (c) the parser has the ability to make on-line revisions based on the syntactic information contained within the utterance.

In the first experiments using tachistoscopic presentation, 75 sentences representing 15 different sentence types were read by subjects. Each type varied in structure and in the clarity of markers, used to indicate …

Parsing Routines In Syntactic Processing: The Effect Of Expected Word Order On Sentence Comprehension, Ann Dibella Jablon

Dissertations, Theses, and Capstone Projects

Two experiments were conducted to test the SVO Expectancy Hypothesis. This hypothesis embodies three claims: (a) the syntactic parsing device has an initial expectation for the SVO (syntactically defined) structure, (b) the parser reads or tracks the syntactic information in the utterance to confirm or adjust its predictions, and (c) the parser has the ability to make on-line revisions based on the syntactic information contained within the utterance.

In the first experiments using tachistoscopic presentation, 75 sentences representing 15 different sentence types were read by subjects. Each type varied in structure and in the clarity of markers, used to indicate …

The Effect Of Cochlear Dysfunction On Central Auditory Speech Test Performance, Barbara Ann Goldstein

Dissertations, Theses, and Capstone Projects

The major purpose of this study was to explore the effect of cochlear dysfunction on central auditory speech test performance. There has been limited research reported concerning the effects of peripheral hearing loss occurring in the absence of central auditory pathology on tests specifically designed to diagnose central auditory impairment. Similarly, there has been limited research reported concerning the effects of peripheral hearing loss in the presence of central auditory pathology on tests designed specifically for the evaluation and diagnosis of central auditory pathology. Despite the lack of such data, these tests are frequently performed on individuals with cochlear pathology, …

Predicting Consonant Confusions In Noise On The Basis Of Acoustical Analyses, Judy Robin Dubno

Dissertations, Theses, and Capstone Projects

No abstract provided.

The Velopharyngeal Mechanism: An Electromyographic Study, Fredericka Bell-Berti

Dissertations, Theses, and Capstone Projects

No abstract provided.

Non-Metric Scaling Of Loudness, Alan M. Richards

Dissertations, Theses, and Capstone Projects

Determination of loudness scales for 1000 Hz stimuli by conventional ratio scaling methods have yielded loudness functions which grow as approximately the 0.54 power of sound pressure. Thus, two-fold loudness differences are equivalent to approximately 10 dB across the auditory continuum. The unidimensional representation of loudness ss a power function of sound intensity implies that if A is twice as loud as B, which, in turn, is twice as loud C, the A will be four times as loud as C. In order to test this implication across the auditory continuum loudness ratio estimates were obtained from four 7x7 matrices …