SLHS Lab Information
Attention and Neurodevelopmental Disorders (AtteND) Lab
The primary focus of the Attention and Neurodevelopmental Disorders Laboratory is to investigate attentional strengths and weaknesses in individuals at-risk for or diagnosed with autism spectrum disorder (ASD). The aim of this research is to provide insight into how attention impacts the development of social and communicative abilities in typically developing children and children with ASD. Ultimately, the goal of this research is to identify new targets for intervention as well as to integrate knowledge of attentional strengths and weaknesses to improve current intervention strategies.
Auditory Cognitive Neuroscience Laboratory
When listening to speech at a noisy public place, most adults find it easier to understand the speaker if they can see his or her face because facial movements can provide a great deal of information about speech content. However, this ability to use visual speech cues when the sound quality is poor is not present at birth and develops only gradually in children. In the Auditory Cognitive Neuroscience Laboratory, we study how and when children learn to use visual speech information and how their language development may be negatively affected if they fail to acquire this skill. We work with typically developing children and also with children who had delayed language acquisition (due to the so-called Specific Language Impairment).
Auditory Electrophysiology Laboratory
Research in this lab utilizes various electrophysiological measures to understand the neural representation of complex sounds in normal and impaired ears at the brainstem and cortical levels and how these representations are shaped by experience. The long term objective of this research program is to advance our knowledge of how neural mechanisms in the auditory brainstem and at early sensory stages of processing in the auditory cortex reorganize with experience to enhance encoding of behaviorally relevant dimensions of sounds and to determine their relative roles in the hierarchical processing of the temporal structure of sound. We are also interested in evaluating the nature of interplay between early sensory level processes and later cognitive level of processingRavi Krishnan
Auditory Neurophysiology and Modeling Lab
Research in the Auditory Neurophysiology and Modeling Laboratory involves the coordinated use of neurophysiology, psychoacoustics, and computational modeling. This multi-disciplinary approach provides a powerful framework to extend our understanding of the effects of different types of sensorineural hearing loss on neural and perceptual responses to sound. This knowledge will be extremely valuable for developing diagnostic tests, for evaluating the limitations of current hearing aids, and for suggesting novel strategies for hearing aids and cochlear implants.
Child Phonology Laboratory
Research in the Child Phonology Laboratory investigates how monolingual and bilingual children learn to produce speech sounds, with the goal of developing best practices for assessing and treating children with phonological disorders. In particular, we are interested in better understanding how the ability to perceive speech sounds impacts the accurate production of speech.
Motor Speech Lab
Our research interests are broad, covering a wide range of topics related to quality of life for older adults and individuals with Parkinson’s disease. The primary focus of our research is the treatment of changes to speech and cognition which occur as a part of typical aging or as a result of diseases of aging (like Parkinson’s disease).
Research in the Psychoacoustics Lab focuses on behavioral measures of peripheral auditory processes in listeners with normal hearing and listeners with cochlear hearing impairment. We are particularly interested in studying dynamic adjustments in response to background noise. We also use models of auditory signal processing to connect behavior and physiology.
Purdue Experimental Amplification Research (EAR) Lab
Research in the Experimental Amplification Research (EAR) laboratory focuses on auditory processes contributing to speech perception deficits in hearing-impaired listeners and hearing aid processing to overcome them. Ongoing projects include work on frequency-lowering techniques, wide dynamic range compression, and speech enhancement techniques.
Purdue Infant Speech Lab
Here in the Purdue Infant Speech lab we explore how language comes to the child. Specifically, our work focuses on whether measures of early speech perception, production, and the input to the child relate to later language in both typical development and in children at-risk for autism spectrum disorders.
Speech Perception and Cognitive Effort (SPACE) Lab
Our research focuses on the contribution of cognitive mechanisms such as working memory and selective attention to understanding speech in difficult circumstances, such as when listening to a talker with an unfamiliar accent or in the presence of competing sounds. We use behavioral and psychophysiological measures to assess speech understanding, cognitive effort and stress in younger and older adults with and without hearing impairment under a range of listening conditions. Results of this research provide insight into the cognitive foundations of spoken language understanding, and contribute to improving methods for the assessment and treatment of hearing impairment in older listeners.
Speech Physiology Lab: Purdue Stuttering Project
Discovering how the human brain performs the miraculous and complex task of producing speech through recording and analysis of physiological signals generated during speaking. Documenting how the neural control of speech movements changes over the life span. Understanding how motor, language, and emotional factors interact in the emergence of developmental stuttering in preschool children.
Sign Language Research Lab
Research in the lab uses theoretical and experimental methods to investigate aspects of sign languages and their similarities and differences compared to spoken languages. Results from this research is applied to improving deaf education and the quality of life of members of the Deaf community. Funding has been provided by NIH and NSF.
Structure of sign languages (SLs), including American (ASL), Croatian (HZJ), and Austrian (OGS) SLs
Experimental studies of SL structure, perception and production, including online questionnaires, psycholinguistic methods, motion capture analysis, and neurolinguistics (fMRI, EEG)
Collaboration with engineers toward automatic recognition of SL
Sivasankar Research Group
The goal of the Sivasankar Research Group is to understand why some speakers experience voice disruptions related to prolonged speaking, aging, environmental exposures, and disease. We utilize a multidisciplinary approach to understand the causes of voice problems so that we can improve the prevention and treatment of this common communication disorder.