Team

Dr. Thomas F. Campbell

Principal Investigator

Thomas Campbell completed his BA and MA in communication disorders at the University of Nebraska-Lincoln, and his PhD in communicative disorders from the University of Wisconsin-Madison. Prior to joining the faculty in the School of Behavioral and Brain Sciences in 2006, he was a professor in the Department of Communication Sciences and Disorders at the University of Pittsburgh, and the Director of Audiology and Communication Disorders at the Children’s Hospital of Pittsburgh.  He served as Executive Director of the Callier Center for Communication Disorders from 2006 to 2020 and is currently Professor Emeritus in the School of Behavioral and Brain Sciences at the University of Texas at Dallas. Dr. Campbell’s research focuses on the identification of physiological, environmental and genetic variables for the early identification of speech and language disorders in children.  His interests also include the development of communication technology to improve the diagnosis and treatment of individuals with communication deficits.

Dr. John H.L. Hansen

Co-Principal Investigator

John H.L. Hansen, received Ph.D. & M.S. degrees from Georgia Institute of Technology, and B.S.E.E. degree from Rutgers Univ. At the University of Texas at Dallas (UTDallas), he is Associate Dean for Research, Professor of Electrical & Computer Engineering, Distinguished Univ. Chair in Telecommunications Engineering, and holds a joint appointment in School of Behavioral & Brain Sciences (Speech & Hearing). At UTDallas, he established Center for Robust Speech Systems (CRSS). He is an ISCA Fellow, IEEE Fellow, past Member and TC-Chair of IEEE Signal Proc. Society, Speech & Language Proc. Tech. Comm.(SLTC), and Technical Advisor to U.S. Delegate for NATO (IST/TG-01). He currently serves as ISCA President. He has supervised 92 PhD/MS thesis candidates, was recipient of 2020 UT-Dallas Provost’s Award for Grad. Research Mentoring, 2005 Univ. Colorado Teacher Recognition Award, and author/co-author of +750 journal/conference papers in the field of speech/language/hearing processing & technology. He served as General Chair for Interspeech-2002, Co-Organizer and Tech. Chair for IEEE ICASSP-2010, and Co-General Chair and Organizer for IEEE Workshop on Spoken Language Technology (SLT-2014) (Lake Tahoe, NV). He is serving as Co-Chair for ISCA INTERSPEECH-2022, and Tech. Chair for IEEE ICASSP-2024.

Dr. Christine Dollaghan

Co-Principal Investigator

Chris Dollaghan received her BA from Wesleyan University, her MA from the University of Montana, and her PhD from the University of Wisconsin-Madison. She was Clinic Director and Professor in Communication Science and Disorders at the University of Pittsburgh prior to joining the faculty in Behavioral and Brain Sciences at UT-Dallas. Her research has focused on developing valid, reliable, unbiased methods for identifying speech and language deficits and predicting communication outcomes in young children. An area of special interest concerns the quality of scientific reasoning and evidence used in clinical decision-making. Chris has taught graduate classes and seminars in pediatric communication disorders, language and reading disorders, and research methods, and she has served on committees for the National Institutes of Health, the Agency on Health Care Research and Quality, and the National Academies of Sciences, Engineering, and Medicine. She chaired the Science Advisory Board and the Research and Scientific Affairs Committee of the American Speech-Language-Hearing Association and is a recipient of the Honors of the Association. 

Dr. Johanna Rudolph

Research Scientist

Johanna Rudolph completed her BA at Thomas Aquinas College in California and her MS and PhD in speech, language, and hearing sciences at Purdue University. She participated in the Callier Postdoctoral Program from 2014-2016 and is currently a Research Scientist at the Callier Center for Communication Disorders. Her research interests include early identification and intervention for children with speech and language disorders.

Jenny H. McGlothlin, MS, CCC-SLP

Speech-Language Pathologist

Jenny McGlothlin completed her BS in Communication Sciences and Disorders at the University of Texas at Austin and her MS in Speech-Language Pathology at the University of Texas at Dallas where she continued to take doctoral courses after graduation due to her interest in research. McGlothlin has been a practicing Speech-Language Pathologist since 2002 and specializes in the differential diagnosis and treatment of pediatric motor speech and feeding disorders. In addition to being an SLP, she is also a Certified Lactation Counselor, working with newborns and their mothers. She taught the graduate course ‘Birth to Three’ for four years, frequently presents nationally and internationally, and is the co-author of two books. McGlothlin has been involved in research at the Callier Center for Communication Disorders since 2011 as a clinical researcher, working on studies focused on differentiation of pediatric speech sound production disorders, automated screening of articulation, and speech movement patterns of individuals with ALS. She recently began working on recruiting and building a database of research participants as the Callier Clinical Research Registry Coordinator. McGlothlin currently serves as the VP of Social & Governmental Policy of the Texas Speech-Language-Hearing Association and has been inducted into the TSHA Hall of Fame for her work in the field.

Prasanna V. Kothalkar, MS

Research Assistant & Doctoral Student

Prasanna Kothalkar is pursuing his Ph.D. degree as a Research Assistant in the Erik Jonsson School of Engineering and Computer Science, University of Texas at Dallas (UTD), Richardson, United States under supervision of Dr. John H. L. Hansen. His research interests focus on Child Speech Pronunciation Modeling, Speech Recognition and Diarization, Machine Learning and Deep Learning. He received the B.S. degree in Computer Engineering from Mumbai University, Mumbai, India in 2010, M.S. degree in Computer Science from University of Texas at Dallas, Dallas, United States, in 2014. He has interned at technology companies for research positions in the areas of Speech Processing and Machine Learning.

Satwik Dutta, MS

Research Assistant & Doctoral Student

Satwik Dutta is pursuing his Ph.D. candidate in Electrical Engineering (Speech/Signal Processing) at the University of Texas at Dallas (UT Dallas) under Dr. John H.L. Hansen. He is primarily affiliated with the Center for Robust Speech Systems. His research interests include Digital Signal Processing, Speech Processing, Speech Recognition, Machine Learning, Silent Speech Interfaces, and Speech Disorders.