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Research Programs

Hearing Instrument | Human Auditory Physiology | Language Learning | Language and Literacy | UT-AACL | Neurocognitive Linguistics | Psychoacoustics | Spatial and Binaural Hearing | Speech Perception and Production | Stuttering and Speech Science | Voice and Speech Science | Cochlear Implant


Hearing Instrument Laboratory
Dr. Patrick Plyler

  • Impact of high Hz amplification on subjective and objective benefit in hearing instrument users
  • Effects of expansion on subjective and objective benefit in hearing instrument users
  • Effects of expansion time constants on subjective and objective benefit in hearing instrument users.

Human Auditory Physiology Laboratory
Dr. Ashley W. Harkrider

  • Neurophysiological correlates for perceptual behavior of normal and impaired populations
  • Underlying physiological mechanisms in the cochlea and/or central auditory nervous system responsible for overt behavioral responses to, and perception of, various acoustic stimuli in quiet and in noise

Language Learning Laboratory
Dr. Devin M. Casenhiser

  • Language learning
    • Effect of input on language learning
    • Language learning as category learning
    • Functional considerations of language learning
    • Learning of syntactic constructions (Construction Grammar)
  • Autism
    • Facilitating language learning and use through social-interaction therapy
    • Importance of language function in approaches to therapy and measurement

Language and Literacy Lab (L3)
Drs. Ilsa Schwarz and Jillian McCarthy

  • Examining factors related to successful language and literacy skills for children, specifically those who are deaf or hard of hearing or those from poverty
  • Investigating and examining the vocabulary use of children and teachers, and relating this information back to language and literacy development for all children
  • Examining linguistic factors related to spelling and writing abilities of children
  • Developing assessment and interventions for spoken and written language disorders

University of Tennessee Augmentative-Alternative Communication, Language, & Literacy Lab (UT-AACL)
Dr. Jillian McCarthy

  • Examining factors related to successful language development and literacy skills, specifically reading and writing, with individuals with motor speech impairments who may or may not use augmentative-alternative communication
  • Investigating the relationship between production and perception on working memory and literacy skills for individuals with motor speech impairments
  • Examining and developing technology to assist in language and literacy learning for individuals with motor speech impairments

Neurocognitive Linguistics Laboratory
Dr. Kristin King

  • For individuals both with and without brain injury:
    • Modeling the neural processes
    • Investigating hemispheric processing and neurocognitive skills utilized for linguistic processes
    • Examining the role of cognitive processes on semantic processing
  • Communication and swallowing disorders arising secondary to traumatic brain injury, stroke, neurologic disease, and dementias in both children and adults

Psychoacoustics Laboratory
Dr. Mark Hedrick

  • Perceptual abilities of listeners with hearing loss
  • Speech perception by listeners with normal hearing and listeners with hearing loss
  • Elucidation of frequency and temporal coding mechanisms

Spatial and Binaural Hearing Laboratory
Dr. Patti Johnstone

  • Sound localization ability
  • Spatial release from masking
  • Aided and prosthetic binaural, bilateral, and spatial hearing
  • Hearing loss prevention

Speech Perception and Production Laboratory
Dr. Deborah Von Hapsburg

  • The effect of signal audibility on the emergence of early vocalization patterns in hearing impaired infants.
  • The effects of increasing word familiarity on bilingual speaker’s speech perception in noise
  • Speech perception in noise in [Korean/English] bilingual listeners

Stuttering and Speech Science Laboratory
Dr. Tim Saltuklaroglu

  • Investigations into the neural mechanisms responsible for inducing fluent speech in people who stutter.
  • Examining the role of mirror neuron systems in speech perception and simulated production tasks via electroencephalograpy (EEG).
  • Investigations into clinical efficacy of altered auditory feedback and other treatments for stuttering.
  • Listener reactions to stuttering:
    • Changes in eye-gaze behaviors and physiological responses. How these reactions may in turn affect people who stutter and their communicative interactions.
  • Anticipatory reactions to stuttering in people who stutter. Changes in physiological responses of anxiety in anticipation of stuttered versus fluent speech.
  • The effects of stuttering on manual functions.

See Also: The Stuttering Treatment and Research Center at University of Tennessee

Voice and Speech Science Laboratory
Dr. Molly Erickson

  • Spasmodic dysphoniaAcoustic and physiology of singing
  • Acoustics of cultural diversity
  • Normative data - vocal physiology
  • Experimental phonetics - duration modeling

Cochlear Implant Laboratory
Dr. Jong Ho Won

  • Computational modeling of the biological infrastructure of the implanted cochlea
  • Various aspects of psychoacoustic sensitivities and speech perception in listeners with normal-hearing, hearing-impaired, and cochlear implants
  • Neural encoding of important speech information in hearing aid users
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Department Audiology & Speech Pathology
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