Kris Tjaden, PhD, CCC-SLP Kris Tjaden is a Professor in the Department of Communicative Disorders and Sciences and the Director of the Motor Speech Disorders (MSD) Laboratory at the University at Buffalo, State University of New York. In addition, she is currently working as Associate Dean of Faculty Affairs in the University at Buffalo, College of Arts and Sciences. Kris completed her M.A. at the University of Minnesota and her Ph.D. at the University of Wisconsin-Madison in the area of Communicative Disorders & Sciences. The MSD lab conducts research investigating the acoustic bases of reduced intelligibility and naturalness in dysarthria secondary to neurodegenerative disease such as Parkinson’s disease and Multiple Sclerosis.
Lab Staff
Annie Rohl, MS, CCC-SLP. Annie has an MS in Speech-Language Pathology at the University of Wisconsin–Madison and worked as a speech-language pathologist for several years before returning to research. She completed her PhD in Neuroscience at the University of Iowa in 2026. Her research focuses on the neural control of speech production and the functional effects of Parkinson’s disease and brain stimulation on speech. With her interdisciplinary background, Annie is passionate about bridging the gap between basic and clinical science to improve the understanding and management of speech changes in neurodegenerative disease.Liam Arzbecker, PhD Volunteer Research AssistantProfessor Lian was drawn to the field because of its practical combination of language and science. After a brief clinical experience, however, she realized she was more interested in researching speech therapy than providing it. Thus, she pursued a PhD in Speech and Hearing Science at Ohio State. Her graduate training was primarily in acoustic analysis and indexical perception, and she’s especially fascinated by the lack of invariance problem. As a Wisconsin native, she may be new to Buffalo—but certainly not to snow! In her free time, Lian enjoys coaching cross country, collecting interesting facts, and attempting to take personality quizzes on behalf of her dog.
Jordan Manes, PhD Volunteer Research Assistant Professor
Jordan completed her PhD in Systems & Cognitive Neuroscience at Northwestern University, specializing in movement and rehabilitation sciences. Her research utilizes acoustic speech measures and functional neuroimaging to better understand brain-behavior interactions associated with neurogenic motor speech disorders, such as Parkinson’s disease.
Amanda R. Allen, MA, CCC-SLP Amanda is the UB Motor Speech Disorders Lab Coordinator. She also practices as a school-based speech-language pathologist for the North Tonawanda City School District. Amanda earned a Master of Arts degree in Communicative Disorders & Sciences in 2016 and a Master of Education degree in English in 2009 from the University at Buffalo.
Olivia Rizzo, M.A. Olivia graduated from the University at Buffalo in 2023 with her Masters in Communicative Disorders and Sciences. Olivia is currently working towards her CCC’s as a Speech-Language Pathologist Clinical Fellow servicing the early intervention and preschool populations in Niagara County. Olivia has been a part of the Motor Speech Disorders Lab team since her time as an undergraduate student; She is happy to remain a member of the MSD Lab as a post-graduate research assistant to continue participating in acoustic analysis for ongoing studies.
Nathan Cline, B.A. Nathan completed his B.A. in Linguistics from the University at Buffalo in May 2021 and is staying at UB to pursue his Ph.D. in Communicative Disorders and Sciences. He was born and raised in Kansas City, Missouri before moving to Buffalo, NY in 2019 and starting in the MSD lab in 2021. He is eager to gain research experience and hopes to continue research in speech production after graduationAnnie Jarvis, B.S. Annie completed her B.S. in Human Biology with a minor in Public Health at the University at Albany. She is excited to be back in her hometown to pursue her M.A. in Speech-Language Pathology. During undergrad, she gained clinical experience working in a children’s hospital and explored linguistics through elective courses.
