This proposal requests continued support for a program of empirical and theoretical research on the perception, analysis, and synthesis of speech and the role of the lexicon in speech perception and auditory word recognition. The major goal of this project is to seek a better understanding of the earliest stages of speech processing. We are interested in how the initial acoustic-phonetic information in the speech waveform interacts with other sources of knowledge to support spoken language understanding. The proposed research will involve behavioral studies, computational analyses using large computerized databases, and simulation and modeling techniques to gain new knowledge about the perceptual and cognitive processes used by human listeners in perceiving phonemes, syllables, words, sentences, and passages of connected fluent speech. The proposed studies are divided into three major projects: (1) perception of synthetic speech generated by rule; (2) auditory word recognition and the lexicon; and (3)contextual variability in speech. From these projects we hope to learn more about how speech signals are processed by the nervous system and how the earliest stages of speech perception are interfaced to some of the more abstract linguistic and cognitive processes involved in spoken language understanding. The findings from this research have implications for normal and pathological language functioning as well as the diagnosis and treatment of communicative disorders involving the perceptual and cognitive processing of speech in adults and children.

National Institute of Health (NIH)
National Institute on Deafness and Other Communication Disorders (NIDCD)
Research Project (R01)
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Communication Sciences and Disorders (CMS)
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Indiana University Bloomington
Schools of Arts and Sciences
United States
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Deocampo, Joanne A; Smith, Gretchen N L; Kronenberger, William G et al. (2018) The Role of Statistical Learning in Understanding and Treating Spoken Language Outcomes in Deaf Children With Cochlear Implants. Lang Speech Hear Serv Sch 49:723-739
Pisoni, David B; Broadstock, Arthur; Wucinich, Taylor et al. (2018) Verbal Learning and Memory After Cochlear Implantation in Postlingually Deaf Adults: Some New Findings with the CVLT-II. Ear Hear 39:720-745
Kronenberger, William G; Henning, Shirley C; Ditmars, Allison M et al. (2018) Verbal learning and memory in prelingually deaf children with cochlear implants. Int J Audiol 57:746-754
Moberly, Aaron C; Harris, Michael S; Boyce, Lauren et al. (2018) Relating quality of life to outcomes and predictors in adult cochlear implant users: Are we measuring the right things? Laryngoscope 128:959-966
Kramer, Scott; Vasil, Kara J; Adunka, Oliver F et al. (2018) Cognitive Functions in Adult Cochlear Implant Users, Cochlear Implant Candidates, and Normal-Hearing Listeners. Laryngoscope Investig Otolaryngol 3:304-310
Casserly, Elizabeth D; Wang, Yeling; Celestin, Nicholas et al. (2018) Supra-Segmental Changes in Speech Production as a Result of Spectral Feedback Degradation: Comparison with Lombard Speech. Lang Speech 61:227-245
Castellanos, Irina; Kronenberger, William G; Pisoni, David B (2018) Psychosocial Outcomes in Long-Term Cochlear Implant Users. Ear Hear 39:527-539
Kronenberger, William G; Castellanos, Irina; Pisoni, David B (2018) Questionnaire-based assessment of executive functioning: Case studies. Appl Neuropsychol Child 7:82-92
Moberly, Aaron C; Castellanos, Irina; Vasil, Kara J et al. (2018) ""Product"" Versus ""Process"" Measures in Assessing Speech Recognition Outcomes in Adults With Cochlear Implants. Otol Neurotol 39:e195-e202
Hunter, Cynthia R; Pisoni, David B (2018) Extrinsic Cognitive Load Impairs Spoken Word Recognition in High- and Low-Predictability Sentences. Ear Hear 39:378-389

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