Faculty Mentors

Dr. Paul Blanchet (Fluency Disorders, Stuttering, Cluttering)

Dr. Blanchet has taught courses in areas such as fluency disorders, motor speech disorders, neuroscience, aphasia, voice disorders, medical speech-language, dysphagia, cleft palate, speech science, phonetics, research methods, and corporate speech pathology.  

Dr. Blanchet’s primary research areas are fluency disorders, motor speech disorders, and the scholarship of teaching and learning.  His specific research interests include university students’ perceptions of speakers who stutter and/or clutter, and the effects of delayed auditory feedback (DAF) on speech production in individuals with Parkinson’s disease.

Dr. Paul Fillmore (Neurorehabilitation - Aphasia, TBI, ASD)

Dr. Fillmore has taught courses in areas such as aphasia, cognitive communication disorders, research methods, neuroimaging analysis, biological psychology and statistics.

Dr. Fillmore’s primary areas of specialization are in neurogenic communication disorders and brain-based research methods. His research interests include the neural correlates of speech and language processing (particularly the interactions between bottom-up and top-down processing in speech comprehension), and applications of cognitive training and neuromodulation techniques to improvement of speech and language function.

Dr. David Garrett, Ph.D. CCC/SLP (1p36 Deletion Syndrome, Voice Physiology and Pathology)

Dr. David Garrett teaches courses in CSD technology and science and medical speech pathology.  Research interests include 1p36 Deletion Syndrome, Vocal Physiology and Pathology, Vocal Health, Reflux, and Parkinsonism.

Dr. Allison Hessling (School-age language and literacy disorders, speech sound disorders, Down Syndrome)

Dr. Hessling is an Assistant Professor at Baylor University. Her research focuses on improving language and literacy outcomes for children with language impairment, including children with primary language impairment and children with Down syndrome. She has authored several peer-reviewed publications and presented her research at local, state, and national conventions. Dr. Hessling is also a certified speech-language pathologist and has worked with children with various speech and language disorders in the public school setting. Dr. Hessling teaches courses in the areas of speech sound disorders and school-age language and literacy.

Dr. Diane Loeb (Preterm birth, play therapy and language therapy, child language & literacy disorders)

Dr. Diane Loeb is a Professor and the Martin Family Endowed Chair of the Department of Communication Sciences and Disorders, Baylor University. Prior to her appointment at Baylor, she served as Chair of the Communication Disorders Department at the University of Nebraska Kearney for two years and as faculty at the University of Kansas for 25 years.

Dr. Loeb is a member of the American Speech, Language, and Hearing Association (ASHA), an ASHA Fellow, and holds the Certificate of Clinical Competence from the ASHA. Dr. Loeb has served as an Associate Editor for three ASHA journals: the Journal of Speech, Language and Hearing Research (JSLHR), the American Journal of Speech-Language Pathology (AJSLP), and Language, Speech, and Hearing Services in the Schools (LSHSS). She currently serves as an Editorial Board member for the LSHSS journal. 

Dr. Loeb’s areas of expertise are language development, language disorders, and language intervention. Over the past two decades, she has been involved in research partnerships that have developed interventions to facilitate the language and emergent literacy skills of children who struggle to communicate and those who are at risk for language disorders. Dr. Loeb has been awarded approximately $11 million in extramural funding as a principal or co-investigator during her career. She has published over 40 peer-reviewed publications in various journals, such as the JSLHR, AJSLP, and LSHSS and provided over 140 presentations at scientific conferences across the country. Most recently, Dr. Loeb’s research has focused on children born preterm and their neurodevelopmental outcomes. She enjoys mentoring students in her research laboratory, and regularly presents and publishes with them. At Baylor, she directs the Early Childhood Language Assessment and Intervention Research Laboratory.

Dr. Kristen Muller (Minimal language, Complex communication disorders, ASD, AAC)

Dr. Muller is an assistant professor at Baylor University. Her primary areas of interest involve expressive and receptive communication for individuals with severe disabilities; and how appropriate assessment and intervention can result in alleviation of problem behavior in this population. She has authored several publications and presented her research at local, state, and national conventions. Dr. Muller is also a certified speech language pathologist and has worked with individuals with complex communication needs as part of her practice.

Dr. Jungjun Park (Multicultural Issues, Parkinson’s Disorder, Aphasia)

Dr. Park is a clinically-trained scientist and directs the Baylor Adult Neurogenic Disorders (BANDA) lab. Dr. Park’s primary research specializes in understanding the neuropsychological and psycholinguistic characteristic of communication difficulties experienced by adults with normal aging process or a range of neurodegenerative conditions such as stroke-induced aphasia, Parkinson’s disease, dementia, traumatic brain injury, and normal aging process.

Dr. Park’s current research project with Parkinson’s patients is particularly concerned with the longitudinal impact of Parkinson’s disease on cognitive and linguistic declines and investigating associated cerebral hemodynamic correlates as measured by the functional near-infrared spectroscopy (fNIRS) technology.  Another emerging line of research focuses on developing or utilizing innovative clinical methodologies such as virtual and augmented reality (VR/AR) systems, interactive metronome (IM) approaches, and various app-based interventive approaches to see if they are suitable for increasing overall linguistic and cognitive profiles in adult neurogenic populations.

Dr. Brittany Perrine (Speech Science, Voice Pathology)

Dr. Perrine’s conducts research in the area of vocal health and voice physiology. She has two major lines of research: 1) improving accuracy of aerodynamic voice measures and their interpretation and 2) determining the contribution of vocal hygiene (how one takes care of their voice) to overall vocal health and voice quality. The latter line of research has lead Dr. Perrine to explore how endocrine and voice production measures vary in individuals under stress, how cheerleading influences vocal aerodynamic and acoustic measures, and how omega 3 fatty acids change a singer’s perception of their voice. 

Dr. Perrine has taught courses in Anatomy and Physiology, Clinical Instrumentation, Voice Pathology, Traumatic Brain Injury, and Cleft Lip and Palate at the graduate and undergraduate level. She has published articles in JSLHR and JASA and serves on the Editorial Review Board for The Journal of Voice.

Dr. Michaela Ritter (Child language & literacy, speech sound disorders)

Dr. Michaela Ritter is Associate Dean for Undergraduate Studies and International Experiences for Robbins College, Associate Professor of Communication Sciences and Disorders, Baylor University. Dr. Ritter teaches undergraduate and graduate courses in phonology and child language and literacy disorders in addition to running a research laboratory. Most of her research has focused on the relationship between oral and written language and the identification and intervention of language disorders in the school-age child. She is particularly interested in the impact of oral language on written language in children with specific language impairment (SLI). In addition to running a research laboratory, she is also the Director of the Language and Literacy Clinic, Baylor University. 

Ritter has published her research in state, national, and international journals in the area of language and literacy. She has presented her research and clinical strategies at state and national conferences as well as regional meetings. Dr. Ritter holds the CCC-SLP from the American Speech-Language-Hearing Association (ASHA).

Dr. Hyunsoo Yoo (Aphasia, Concussion)

Dr. Yoo’s primary areas of specialization are in neurogenic language disordered population to healthy controls. Her research focus is on people who have sustained brain damage from stroke (with/without aphasia) and mTBI (specifically, sports-related concussion) and the subsequent changes in their cognitive and language behaviors, brain structures and connections. The cognitive factors that interest her most are processing speed, working memory, attention & executive function.

Dr. Yang-Soo Yoon (Hearing, tinnitus)

Dr. Yoon focuses on two high-impact clinical needs in audiology: improving speech perception in noise by optimizing integration process in binaural hearing and developing a new effective treatment for tinnitus. These areas are investigated in a highly interdisciplinary manner using psychoacoustic, electrophysiological, and engineering paradigms. In speech perception study, two specific aims set forth: (1) to determine how brain integrates spectral and temporal information processed by a hearing aid ear and a cochlear implant ear and (2) to enhance integration for process for improved speech perception in noise. The immediate goal of tinnitus study is to define how acupuncture intervention influences changes in the function of primary peripheral and central auditory pathways. Student researchers will assist with subject recruitment, data collection, data analysis, conference presentation, and manuscript writing. They will also involve in learning of basic research skills and tools which include statistical analysis, signal creating and editing, and signal processing and programming.