Education Commons^™

Chronic Subjective Dizziness (Csd) Vs. Conversion Disorder: Discussion Of Clinical Findings And Rehabilitation., Julie A. Honaker, Jane M. Gilbert, Jeffrey P. Staab

Department of Special Education and Communication Disorders: Faculty Publications

PURPOSE: Audiologists frequently encounter patients who complain of chronic dizziness or imbalance, in the absence of active vestibular or neurological deficits. Knowledge about conditions that cause this clinical presentation will allow audiologists to make important contributions to accurate diagnosis and effective management of these patients. This article reviews two such conditions, chronic subjective dizziness (CSD) and conversion disorder. METHOD: A case of CSD and another of conversion disorder are presented with a literature review of their clinical presentations, key diagnostic features, and treatment strategies. The role of the audiologist in assessing patients with these conditions and facilitating appropriate treatment referrals …

Modified Head Shake Computerized Dynamic Posturography, Julie A. Honaker, Connie M. Converse, Neil T. Shepard

Department of Special Education and Communication Disorders: Faculty Publications

PURPOSE: Recent research on head shake posturography has demonstrated a modest increase in sensitivity to identifying peripheral vestibular system asymmetry when horizontal head movements were added to portions of the standard Sensory Organization Test (SOT) battery. However, limitations with respect to the head shake protocol were outlined, and usable data for assessing performance could not be established. The purpose of this study was to test a change in protocol for use of head shake SOT to address the noted limitations.
METHOD: Forty participants ranging in age from 20 to 79 years with no history of dizziness completed Conditions 2 and …

A Short Report: Word-Level Phonological And Lexical Characteristics Interact To Influence Phoneme Awareness, Tiffany Hogan

Department of Special Education and Communication Disorders: Faculty Publications

In this study, we examined the influence of word-level phonological and lexical characteristics on early phoneme awareness. Typically-developing children, ages 61-78 months, completed a phoneme-based, odd-one-out task that included consonant-vowel-consonant word sets (e.g., “chair-chain-ship”) that varied orthogonally by a phonological characteristic, sound-contrast similarity (similar vs. dissimilar), and a lexical characteristic, neighborhood density (dense vs. sparse). In a subsample of the participants – those with the highest vocabularies – results were in line with a predicted interactive effect of phonological and lexical characteristics on phoneme awareness performance: word sets contrasting similar sounds were less likely to yield correct responses in words …

Vowel Recognition From Articulatory Position Time-Series Data, Jun Wang, Ashok Samal, Jordan R. Green, Tom D. Carrell

Department of Special Education and Communication Disorders: Faculty Publications

A new approach of recognizing vowels from articulatory position time-series data was proposed and tested in this paper. This approach directly mapped articulatory position time-series data to vowels without extracting articulatory features such as mouth opening. The input time-series data were time-normalized and sampled to fixed-width vectors of articulatory positions. Three commonly used classifiers, Neural Network, Support Vector Machine and Decision Tree were used and their performances were compared on the vectors. A single speaker dataset of eight major English vowels acquired using Electromagnetic Articulograph (EMA) AG500 was used. Recognition rate using cross validation ranged from 76.07% to 91.32% for …

Preface To The 18th Annual Asha-Nih Research Symposium: Neurobiological Determinants Of Communication Development, Steven M. Barlow, Jordan R. Green

Department of Special Education and Communication Disorders: Faculty Publications

Neurobiological studies of the mammalian brain in health and disease have contributed greatly towards an improved understanding of the maturation-dependent vulnerability of the late preterm brain, the plasticity of the immature nervous system, and the evolution of specialized mechanisms for a communication or ‘language-ready’ neural substrate. Advances in developmental neurobiology have important implications for speech-language pathologists and audiologists working with neonates who, by virtue of their prematurity, are at risk for developmental disabilities. The extra-uterine environment during this critical period (24–40 weeks gestation) in brain development has a profound and long lasting impact on the premature infant. Prior barriers to …

Statistical Frequency In Perception Affects Children’S Lexical Production, Peter T. Richtsmeier, Louann Gerken, Lisa Goffman, Tiffany Hogan

Department of Special Education and Communication Disorders: Faculty Publications

Children’s early word production is influenced by the statistical frequency of speech sounds and combinations. Three experiments asked whether this production effect can be explained by a perceptual learning mechanism that is sensitive to word-token frequency and/or variability. Four-year-olds were exposed to nonwords that were either frequent (presented 10 times) or in¬frequent (presented once). When the frequent nonwords were spoken by the same talker, children showed no significant effect of perceptual frequency on production. When the frequent nonwords were spoken by different talkers, children produced them with fewer errors and shorter latencies. The results implicate token variability in perceptual learning.

Kinematic Analysis Of Articulatory Coupling In Acquired Apraxia Of Speech Post-Stroke, Carly J. Bartle-Meyer, Justine V. Goozée, Bruce E. Murdoch, Jordan R. Green

Department of Special Education and Communication Disorders: Faculty Publications

Primary objective: Electromagnetic articulography was employed to investigate the strength of articulatory coupling and hence the degree of functional movement independence between individual articulators in apraxia of speech (AOS). Methods and procedures: Tongue-tip, tongue-back and jaw movement was recorded from five speakers with AOS and a concomitant aphasia (M = 53.6 years; SD = 12.60) during /ta, sa, la, ka/ syllable repetitions, spoken at typical and fastrates of speech. Covariance values were calculated for each articulatory pair to gauge the strength of articulatory coupling. The results obtained for each of the participants with AOS were individually compared to those obtained …

The Development Of Jaw Motion For Mastication, Erin M. Wilson, Jordan R. Green

Department of Special Education and Communication Disorders: Faculty Publications

The developmental course of early chewing has rarely been studied, although such knowledge is essential for understanding childhood feeding and swallowing disorders. The goal of this investigation was to quantitatively describe age- and consistency-related changes in jaw kinematics during early chewing development. An optical-motion tracking system was used to record jaw movements during chewing in 3-dimensions in 11 typically-developing participants longitudinally from 9–30 months of age. Age related changes in jaw movement were described for both puree and regular consistencies. The findings demonstrated that the development of rotary jaw motion, jaw motion speed, and management of consistency upgrades are protracted …

Early Speech Motor Development: Cognitive And Linguistic Considerations, Ignatius S. B. Nip, Jordan R. Green, David B. Marx

Department of Special Education and Communication Disorders: Faculty Publications

This longitudinal investigation examines developmental changes in orofacial movements occurring during the early stages of communication development. The goals were to identify developmental trends in early speech motor performance and to determine how these trends differ across orofacial behaviors thought to vary in cognitive and linguistic demands (i.e., silent spontaneous movements, babble, and first words). Movements of the lower lip and jaw were recorded using a three-dimensional motion capture system. Twenty-four infants were observed every 3 months, from 9 to 21 months of age. Jaw and lower lip speed, and lower lip range of movement increased with age. Silent spontaneous …

Neurobiological Determinants Of Communication Development, Steven M. Barlow, Jordan R. Green

Department of Special Education and Communication Disorders: Faculty Publications

Neurobiological studies of the mammalian brain in health and disease have contributed greatly towards an improved understanding of the maturation-dependent vulnerability of the late preterm brain, the plasticity of the immature nervous system, and the evolution of specialized mechanisms for a communication or “language-ready” neural substrate. Advances in developmental neurobiology have important implications for speech-language pathologists and audiologists working with neonates who, by virtue of their prematurity, are at risk for developmental disabilities. The extra-uterine environment during this critical period (24–40 weeks gestation) in brain development has a profound and long lasting impact on the premature infant. Prior barriers to …

Accuracy Assessment For Ag500, Electromagnetic Articulograph, Yana Yunusova, Jordan R. Green, Antje Mefferd

Department of Special Education and Communication Disorders: Faculty Publications

Purpose: The goal of this article was to evaluate the accuracy and reliability of the AG500 (Carstens Medizinelectronik, Lenglern, Germany), an electromagnetic device developed recently to register articulatory movements in three dimensions. This technology seems to have unprecedented capabilities to provide rich information about time-varying positions of articulators. However, strengths and weaknesses of the system need to be better understood before the device is used for speech research.
Method: Evaluations of the sensor positions over time were obtained during (a) movements of the calibration device, (b) manual movements of sensors in a cartridge within the recording field of the cube, …

A Nonword Repetition Task For Speakers With Misarticulations: The Syllable Repetition Task (Srt), Lawrence D. Shriberg, Heather L. Lohmeier, Thomas F. Campbell, Christine A. Dollaghan, Jordan R. Green, Christopher A. Moore

Department of Special Education and Communication Disorders: Faculty Publications

Purpose. Conceptual and methodological confounds occur when non(sense) repetition tasks are administered to speakers who do not have the target speech sounds in their phonetic inventories or who habitually misarticulate targeted speech sounds. We describe a nonword repetition task, the Syllable Repetiton Task (SRT) that eliminates this confound and report findings from three validity studies.
Method. Ninety-five preschool children with Speech Delay and 63 with Typical Speech, completed an assessment battery that included the Nonword Repetition Task (NRT: Dollaghan & Campbell, 1998) and the SRT. SRT stimuli include only four of the earliest occurring consonants and …

Fukuda Stepping Test: Sensitivity And Specificity, Julie A. Honaker, Neil T. Shepard

Department of Special Education and Communication Disorders: Faculty Publications

Background: A vestibulospinal test known as the Fukuda Stepping Test (FST) has been suggested to be a measure of asymmetrical labyrinthine function. However, an extensive review of the performance of this test to identify a peripheral vestibular lesion has not been reported.
Purpose: The purpose of this study was to evaluate the sensitivity and specificity of the standard FST and a head shaking variation for identification of a peripheral vestibular system lesion.
Research Design: In this retrospective review, we compared performance on the FST with and without a head shaking component to Electronystagmography (ENG) caloric irrigation unilateral weakness results.
Study …

Future Advances In The Early Detection Of Reading Risk: Subgroups, Dynamic Relations, And Advanced Methodologies: Epilogue To Journal Of Learning Disabilities Special Edition “Advances In The Early Detection Of Reading Risk”, Tiffany Hogan, Jennifer M. Thomson

Department of Special Education and Communication Disorders: Faculty Publications

Six studies and 1 synthesis focused on early identification of reading impairment in this special edition. A familiar theme emerged: reading involves multiple subsystems that dynamically interact across development making early identification a ‘moving target’ (cf Speece, 2005). Based on the cumulative findings presented in this edition, we pose 5 key considerations for future advances in the early detection of reading risk: (a) attention to the definition of ‘reading’ and the heterogeneity of poor readers (b) longitudinal dynamic relations, (c) application of advanced, theory-driven methodology and statistical models, (d) early identification that leads to prescriptive early intervention, (e) early identification …

Types Of Language Disorders In Students Classified As Ed: Prevalence And Association With Learning Disabilities And Psychopathology, Gregory J. Benner, Richard E. Mattison, J. Ron Nelson, Nicole C. Ralston

Department of Special Education and Communication Disorders: Faculty Publications

The purpose of this study was to determine the prevalence of four types of language disorders among public school students (N = 152) classified as Emotional Disturbance (ED). We also examined the association of the types of language disorders experienced by these students with specific learning disabilities and clinical levels of specific types of psychopathology. Nearly 66% of the students with ED experienced a language disorder, with combined receptive-expressive disorders being the most common (35.5%). Students with a language disorder, particularly combined receptive-expressive disorder, showed significantly poorer achievement and more learning disabilities (LD) in all areas compared to students with …

Introduction: Advances In The Early Detection Of Reading Risk, Jennifer M. Thomson, Tiffany Hogan

Department of Special Education and Communication Disorders: Faculty Publications

As we write the prologue to this Special Issue of the Journal of Learning Disabilities, "Advances in the early detection of reading risk," the U.S. National Early Literacy Panel has recently released its report, “Developing Early Literacy” (National Early Literacy Panel, 2008). A chapter of the report is devoted to reviewing studies that attempt to identify the most accurate preschool and kindergarten predictors of later outcomes in reading and spelling. The report is affirmative of an emerging consensus that the very early status of skills directly related to literacy: alphabet knowledge, phonological awareness, rapid automatic naming (RAN), phonological memory and …

Nonparticipatory Stiffness In The Male Perioral Complex, Shin-Ying Chu, Steven M. Barlow, Jaehoon Lee

Department of Special Education and Communication Disorders: Faculty Publications

Purpose—The objective of this study was to extend previous published findings in the authors’ laboratory using a new automated technology to quantitatively characterize nonparticipatory perioral stiffness in healthy male adults.

Method—Quantitative measures of perioral stiffness were sampled during a nonparticipatory task using a computer-controlled linear motor servo programmed to impose a series of tensile displacements over a span of approximately 24 mm at the oral angle in 20 healthy young male adults. Perioral electromyograms were simultaneously sampled to confirm nonparticipation or passive muscle state. Perioral stiffness, derived as a quotient from resultant force (ΔF) and oral span (ΔX), was modeled …

The Child Outcomes Of A Behavior Model, J. Ron Nelson, Kristin Duppong-Hurley, Lori Synhorst, Michael Epstein, Scott Stage, Jacquelyn Buckley

Department of Special Education and Communication Disorders: Faculty Publications

Within 3-tier behavioral models, universal interventions are expected to prevent the onset of problem behavior in a majority of children altogether and to sustain improvements in child outcomes by the selected and indicated interventions. A cohort longitudinal design was used to assess the extent to which a 3-tier model achieves these expected outcomes. The respective universal, selected, and indicated interventions included Behavior and Academic Support and Enhancement. First Step to Success, and MultiSystemic Therapy. A total of 407 children in Grades K-3 from 1 of 4 longitudinal cohorts participated. The results of 2-level linear growth analyses indicate that the 3-tier …

Oral And Respiratory Control For Preterm Feeding, Steven M. Barlow

Department of Special Education and Communication Disorders: Faculty Publications

Purpose of review—Feeding competency is a frequent and serious challenge to the neonatal intensive care unit survivors and to the physician–provider–parent teams. The urgency of effective assessment and intervention techniques is obviated to promote safe swallow, as attainment of oral feeding for the preterm infant/newborn is one of the prerequisites for hospital discharge. If left unresolved, feeding problems may persist into early childhood and may require management by pediatric gastroenterologists and feeding therapists. This review highlights studies aimed at understanding the motor control and development of nonnutritive and nutritive suck, swallow, and coordination with respiration in preterm populations.

Recent findings—Functional …

Changes In Responsiveness When Brain Injury Survivors With Impaired Consciousness Hear Different Voices, Steffany Chleboun, Karen Hux, Jeff Snell

Department of Special Education and Communication Disorders: Faculty Publications

Primary objective—The researchers sought to determine whether individuals with impaired consciousness secondary to acquired brain injury (ABI) changed in responsiveness when purposefully presented with familiar, unfamiliar, and synthetic voice messages.

Research design—Researchers used an ABA single case study design across stimuli. Participants were 3 minimally-responsive ABI survivors.

Methods and procedures—Participants heard auditory stimuli two times daily for thirty days. Data from video recordings included tallies of behavioural responses at 10-second intervals throughout baseline, intervention, and post-intervention phases of each session. Statistical calculations allowed determination of responsiveness changes across time intervals within sessions.

Main outcomes and results—Unique response profiles emerged across …

Modeling The Developmental Patterns Of Auditory Evoked Magnetic Fields In Children, Rupesh Kotecha, Maria Pardos, Yingying Wang, Ting Wu, Paul Horn, David Brown, Douglas Rose, Ton Degrauw, Jing Xiang

Department of Special Education and Communication Disorders: Faculty Publications

Background: As magnetoencephalography (MEG) is of increasing utility in the assessment of deficits and development delays in brain disorders in pediatrics, it becomes imperative to fully understand the functional development of the brain in children.

Methodology: The present study was designed to characterize the developmental patterns of auditory evoked magnetic responses with respect to age and gender. Sixty children and twenty adults were studied with a 275-channel MEG system.

Conclusions: Three main responses were identified at approximately 46 ms (M50), 71 ms (M70) and 106 ms (M100) in latency for children. The latencies of M70 and M100 shortened with age …

Effects Of Audibility And Multichannel Wide Dynamic Range Compression On Consonant Recognition For Listeners With Severe Hearing Loss, Evelyn Davies-Venn, Pamela Souza, Marc Brennan, G. Christopher Stecker

Department of Special Education and Communication Disorders: Faculty Publications

Objective—This study examined the effects of multichannel wide-dynamic range compression (WDRC) amplification and stimulus audibility on consonant recognition and error patterns.

Design—Listeners had either severe or mild-to-moderate sensorineural hearing loss. Each listener was monaurally fit with a wearable hearing aid using typical clinical procedures, frequency-gain parameters and a hybrid of clinically prescribed compression ratios for DSL (Scollie et al., 2005) and NAL-NL (Dillon, 1999). Consonant-vowel nonsense syllables were presented in soundfield at multiple input levels (50, 65, 80 dB SPL). Test conditions were four-channel fast-acting WDRC amplification and a control compression limiting (CL) amplification condition. Listeners identified the stimulus heard …

Central Pattern Generation Involved In Oral And Respiratory Control For Feeding In The Term Infant, Steven M. Barlow

Department of Special Education and Communication Disorders: Faculty Publications

Purpose of review—Drinking and eating are essential skills for survival and benefit from the coordination of several pattern generating networks and their musculoskeletal effectors to achieve safe swallows. Oral-pharyngo-esophageal motility develops during infancy and early childhood, and is influenced by various factors, including neuromuscular maturation, dietary and postural habits, arousal state, ongoing illnesses, congenital anomalies, and the effects of medical or surgical interventions. Gastroesophageal reflux is frequent in neonates and infants, and its role in neonatal morbidity including dysphagia, chronic lung disease, or apparent life-threatening events is not well understood. This review highlights recent studies aimed at understanding the development …