Faculty
Abbas, Paul, Professor and Department Chair
Akeson, Marcia Clinical Supervisor
Alipour, Fariborz Adjunct Professor
Bass-Ringdahl Sandie Assistant Professor
Bentler, Ruth Professor
Brown, Carolyn J. Professor
Bryant, Karen Clinical Assistant Professor
Cilek, Toni Clinical Associate Professor
Duff, Melissa Assistant Professor
Fennell, Ann Clinical Associate Professor
Finnegan, Eileen Associate Professor
Fleckenstein, Stephanie Clinical Assistant Professor
Gfeller, Kate Professor
Goodman, Shawn Assistant Professor
Gordon, Jean K. Associate Professor
Holte, Lenore Clinical Professor
Hurtig, Richard Professor
Junkins, Sally Lecturer
Karnell, Michael Associate Professor
Kelsay, Danielle Clinical Associate Professor
Kirk, Karen Professor
Klemuk, Sarah Adjunct Assistant Professor
Louko, Linda Clinic Director
McGregor, Karla Professor
Miller, Charles Adjunct Associate Professor
Moon, Jerald Professor
Niebuhr, Diane Clinical Associate Professor
Owen, Amanda Assistant Professor
Reiss, Lina Postdoctoral Researcher
Titze, Ingo Professor
Tomblin, J. Bruce Professor
Turner, Christopher Professor
Tyler, Richard Professor
Wallace, Anne Clinical Associate Professor
Zebrowski, Patricia Professor

Professional / Scientific Staff
Arenas, Rick Research Assistant
Berns, Amanda Research Assistant
Boghossian, Nancy Research Assistant
Eden, Nichole Research Assistant
Ferguson, Connie Speech-Language Pathologist
Fick, Wendy Research Assistant
Lehrman, Kelvin Network Administrator
Lu, Xiaoying Research Assistant
Nixon, Brie Research Assistant
O'Brien, Marlea Program Associate
Ostrem, Julie Program Associate
Rebal, Kathy Administrative Specialist
St. Clair Marcia Field Examiner
Wald Arik Programmer
Walker, Elizabeth Audiologist
Wood, David Electronics Technician

Secretarial Staff
Albright, Dorothy
Miller, Kathy
O'Keefe, Joanne
Thomason, Sharon
Yotty, Mary Jo

copyright, The University of Iowa (2010). All rights reserved.

Email: julie-ostrem@uiowa.edu
334-D Speech & Hearing Center
319 / 335-6602

Julie Ostrem's professional interests focus on the development of educational and service outreaches. Much of her work has been in the area of voice, although she wove the website for the Child Language Research Center and currently serves as the Department webmaster. She previously led a team in the creation of the Voice Academy, an NIDCD-funded website built for the vocal health of schoolteachers. She is currently working with Dr. Richard Hurtig on his Department of Education- funded project to assess the effectiveness of a reading comprehension intervention in the Chicago Public Schools.

 

Email: paul-abbas@uiowa.edu
Office #: Room 127B SHC
319 / 335-8733

Joint appointment
Department of Otolaryngology-Head & Neck Surgery

Research interests
Paul Abbas's research interest focuses on auditory physiology with emphasis on electrical stimulation of the ear. Studies include the application of electrophysiological measures in cochlear implant users as well as basic research and modeling of the response properties of the auditory nervous system to electrical stimulation.

Auditory Physiology Laboratory

Related Web Sites
Neural Prosthesis Program Contract Progress Reports
NIH Neural Prosthesis Program

Selected publications
Miller, C.A., Abbas, P.A. & Robinson, B.K. (2001). Response Properties of the Refractory Auditory Nerve Fiber. JARO, 2, 216-232.

Miller, C.M., Robinson, B.K., Rubinstein, J.T., Abbas, P.J. & Samuelson, C.R. (2001). Auditory nerve responses to monophasic and biphasic electric stimuli. Hearing Research, 151, 79-99.

Miller, C.M., Abbas, P.J., & Brown, C.J. (2000) A new method of reducing stimulus artifact in the electrically evoked whole nerve potential. Ear and Hearing. 21, 280-290.

Purdy S.J. & Abbas P.J. (2002) ABR thresholds to tonebursts gated with Blackman and linear windows in adults with high frequency sensorineural hearing loss. Ear and Hearing, 23, 358-68

Gantz, B.J., Tyler, R.S., Rubinstein, J.T., Wolaver, A., Lowder, M., Abbas, P.J., Brown, C.J., Hughes, M.L. & Preece, J.P. (2002). Binaural cochlear implants: Results of subjects implanted bilaterally during the same operation. Otology & Neurotology, 23, 169-180.

Miller, C.M. Abbas, P.J. Nourski, K.V. Hu, N. Robinson, B.K. (2003) Electrode configuration influences action potential initiation site and ensemble stochastic response properties. Hearing Research, 175, 200-214.

Hu, N., Abbas, P.J. Miller, C.A., Robinson, B.K., Nourski, K.V., Jeng, F.C., Abkes, B.A., Nichols, J.M. (2003). Auditory Response to Intracochlear Electric Stimuli following Furosemide Treatment. Hearing Research, 185 77-89.

Mino, H., Rubinstein, J.T., Miller, C.A., Abbas, P.A. (2003). Effects of Electrode-to-Fiber Distance on Temporal Jitter with Electrical Stimulation. IEEE-TBME.

Abbas, P.J. & Miller C.A. (2004) Biophysics and Physiology. In Cochlear Implants, (eds F-G. Zeng, R. Fay and A. Popper) Springer-Verlag.

Abbas, P.J., Hughes, M.L., Brown, C.J., Miller, C.A., South, H. (2004). Channnel interaction in cochlear implant users evaluated using the electrically evoked compound action potential. Audiology and Neurotology, 9, 203-23.

Email: alipour@iowa.uiowa.edu
334-E Speech & Hearing Center
319 / 335-8694

Fariborz Alipour received his formal training in mechanical engineering and has been working for more than 20 years investigating the human voice. His specific research interests include speech biomechanics, finite element modeling of vocal fold vibration, aerodynamics and acoustics of voice, and computer simulation of phonation.

 

Email: marcia-akeson@uiowa.edu
127-B Speech & Hearing Center
319 / 335-8725

Professional Interests
Neurogenic speech/language disorders

Email: sandie-bass-ringdahl@uiowa.edu
125-C Speech & Hearing Center
319 / 335-8728

Research interests
Early speech development of infants and toddlers who are deaf or hard of hearing, newborn hearing screening, aural (re)habilitation, and cochlear implants.

Member of the Delta Center

Publications

Journal Articles
Moore, J.A. & Bass-Ringdahl, S. (2002). Role of infant vocal development in candidacy for and efficacy of cochlear implantation. Annals of Otology, Rhinology & Laryngology, 111(5), 52-55.

Margolis, RH., Bass-Ringdahl, S., Hanks, W.D., Holte, L., and Zapala, D.A. (2003). Tympanometry in newborn infants – 1kHz Norms. Journal of the American Academy of Audiology, 14(7), 386-395.

Barker, B.A. & Bass-Ringdahl, S.M. (2004). The effect of audibility on audio-visual speech perception in infant cochlear implant recipients. International Congress Series, 1273, Cochlear Implants, Proceedings ofthe VIII International Cochlear Implant Conference, 316-319.

Spencer, L.J. & Bass-Ringdahl, S. (2004). An evolution of communication modalities: very young cochlear implant users who transitioned from sign to speech during the first years of use. International Congress Series, 1273, Cochlear Implants, Proceedings of the VIII International Cochlear Implant Conference, 352-355.

Collison, E.A. & Bass-Ringdahl, S.M. (2007). Babbling complexity and its relationship to speech and language outcomes in children with cochlear implants. Otology & Neurotology, 29, 225-229.

Ringdahl, J.E., Falcomata, T.S., Christensen, T.J., Bass-Ringdahl, S.M., Lentz, A., Dutt, A. & Schuh- Claus, J. (2009). Evaluation of a pre-treatment to select mand topographies for functional communication training. Research in Developmental Disabilities, 30(2), 330-341.

Book Chapters
Bosch, J. & Bass-Ringdahl, S.M. (in press, anticipated publication Summer 2009). Sensory Impairment.

In Betz, C.L. & Nehring,W.M. (Eds.), Nursing care for individuals with developmental disabilities: An integrated approach. Baltimore, MD: Paul H. Brookes Publishing Co., Inc.

Currently Under Review
Bass-Ringdahl, S.M. The relationship of audibility and the development of canonical babbling in young children with hearing impairment.

Bass-Ringdahl, S.M., Ringdahl, J.E. & Boelter, E.W. Use of differential reinforcement to increase hearing aid compliance: a preliminary investigation.

Email: ruth-bentler@uiowa.edu
122-B Speech & Hearing Center
319 / 335-8723

Lab website
Hearing Aid Lab

Research interests
Hearing aid technology with emphasis in evaluation of device effectiveness and user satisfaction.

Publications
Bentler, R., Wu, Y-H., Kettel, J., Hurtig, R. (Submitted). Digital Noise Reduction: Outcomes from field and lab studies. International Journal of Audiology.

Ou, H., Bentler, R.A., Dunn, C. (Submitted). Comparison of unilateral cochlear implant adult users and those that use hearing aids and cochlear implants in opposite ears by Satisfaction with Amplification in Daily Life (SADL) scale. International Journal of Audiology.

Shin, M, Wang, S., Bentler, R., He, S. (2007). New feedback detection method for performance evaluation of hearing aids. Sound and Vibration, 302:350-360.

Wu, Y-H., Bentler, R.A. (2007). Using a signal cancellation technique to assess adaptive directivity of hearing aids. Journal of the Acoustical Society of America, 122(1): 496-511.

Henning, R. & Bentler, R. (In Press). Compression and the short-term dynamic range of speech. Journal of Speech-Language-Hearing Research.

Dittberner, A.B. & Bentler, R.A. (2007). Predictive measures of directional benefit. Part 1: A three-dimensional, instrument-based approach to estimating the Directivity Index (DI). Ear & Hearing, 28(1):26-45.

Dittberner, A.B. & Bentler, R.A. (2007). Predictive measures of directional benefit. Part 2: Verification of different approaches to estimating directional benefit. Ear & Hearing, 28(1):46-61.

Palmer, C.P., Bentler, R.A., Mueller, H.G., & Ruscetta, M. (In Press). Self-perceived localization ability with an adaptive directional microphone. American Journal of Audiology.

Bentler, R.A., Chiou (2006). Digital Noise Reduction: An Overview. Trends in Amplification, 10(2):71-82.

Palmer, C., Bentler, R. & Mueller, H.G. (2006). Amplification and the perception of annoying and aversive sounds. Trends in Amplification, 10(2):95-104.

Bentler, R., Palmer, C., & Mueller, H.G. (2006). Evaluation of a second-order directional microphone hearing aid: Speech perception outcomes. Objective test measures. Journal of American Academy of Audiology, 17: 179-189.

Palmer, C., Bentler, R. & Mueller, H.G. (2006). Evaluation of a second-order directional microphone hearing aid: Self-report outcomes. Self-Report outcomes. Journal of American Academy of Audiology, 17: 190-201.

Mueller, H.G., and Bentler, R.A. (2005). Fitting hearing aids using clinical measures of loudness discomfort levels: An systematic review of effectiveness. Journal of American Academy of Audiology, 16:465-477.

Henning, R. & Bentler, R. (2005). Compression-dependent differences in hearing aid gain between speech and non speech signals. Ear and Hearing, 26(4), 409-422.

Bentler, R., Egge, J., Tubbs, J., Dittberner, A. & Flamme, G. (2004). Quantification of directional benefit across different polar response patterns. Journal of the American Academy of Audiology, 15, 649-659.

Bentler, R., Tubbs, J., Egge, J., Flamme, G., & Dittberner, A. (2004). Evaluation of an adaptive directional system in a dsp hearing aid. American Journal of Audiology, 13, 73-79.

Bentler, R., Palmer, C. & Dittberner, A. (2004). Hearing in noise: Comparison of listeners with normal and (aided) impaired hearing. Journal of the American Academy of Audiology, 15, 216-225.

Bentler, R., Niebuhr, D., Johnson, T., & Flamme, G. (2003). Impact of digital labeling on outcome measures. Ear & Hearing, 24, 215-224.

Warner, R. & Bentler, R. (2002). Threshold of discomfort for complex stimuli: Acoustic and sound quality predictors. Journal of Speech-Language-Hearing Research, 45(5),1016-1026 .

Novick, M., Bentler, R., Dittberner, A., & Flamme, G. (2001). The effects of release time and directionality on unilateral and bilateral hearing aid fittings in complex sound fields. Journal of the American Academy of Audiology, 12, 493-504.

Bentler, R.A. & Nelson, J.A. (2001). Effect of spectral shaping on loudness discomfort. Journal of the American Academy of Audiology, 12(8), 431-437.

Bentler, R. & Cooley, L. (2001). An examination of several characteristics that affect the prediction of OSPL90. Ear & Hearing, 22, 3-20.

Bentler, R.A. (2000). List equivalency and test-retest reliability of the Speech in Noise (SIN) test. American Journal of Audiology: A Journal of Clinical Practice, 9, 3-10. Editors Award

Bentler, R.A. & Duve, M. (2000). Comparison of hearing aids over the 20th Century. Ear and Hearing, 21, 625-639.

Bentler, R. & Kramer, S. (2000). Guidelines for choosing an outcome measure. Ear & Hearing, 21, 37S-49S.

Email: carolyn-brown@uiowa.edu
127-A Speech & Hearing Center
319 / 335-8734

Research interests
Auditory physiology with emphasis in electrically evoked potentials and cochlear implants.

Publications
Abbas, P.J., Brown, C.J., Shallop, J.K., Firszt, J.B., Hughes, M.L., Hong, S.H., and Staller, S.J. (1999). Summary of results using the Nucleus CI24M implant to record the electrically evoked compound action potential (EAP). Ear and Hearing. 20 (1), 45-59.

Brown, C.J., Hughes, M., Lopez, S.M. and Abbas, P.J. (1999) The relationship between EABR thresholds and levels used to program the Clarion speech processor. Annals Otology, Rhinology, Laryngology. Suppl 177, 108, 50-57.

Brown, C.J., Abbas, P.J. and Gantz, B.J. (1998). Auditory Nerve Potentials Recorded Using the Neural Response Telemetry System of the Nucleus CI24M Cochlear Implant: Preliminary Data. American Journal of Otology.

Brown, C.J., Abbas, P.J., Borland, J., Bertschy, M. (1996) Electrically evoked whole nerve action potentials in Ineraid cochlear implant users and their relationship to psychophysical performance. Journal of Speech and Hearing Research, 39, 453-467.

Brown, C.J., Abbas, P.J., Bertschy, M., Tyler, R., Lowder, M., Takahashi, G., Purdy, S., and Gantz, B.J. (1995). Longitudinal Assessment of Physiological and Psychophysical Measures in Cochlear Implant Users. Ear and Hearing, 16, 1-11.

Brown, C.J., Abbas, P.J., Fryauf-Bertschy, H., Kelsay, D. and Gantz, B.J. (1994) Intraoperative and Postoperative Electrically Evoked Auditory Brainstem Responses (EABR) in Nucleus Cochlear Implant Users: Implications for the Fitting Process. Ear and Hear, 15, 168-176.

Gantz, B.J., Brown, C.J., and Abbas, P.J. (1994). Intraoperative measures of the electrically evoked auditory nerve compound action potential. American J. of Otology, 15, 137-144.

Email toni-cilek@uiowa.edu
122-D Speech & Hearing Center
319 / 335-8744

Toni Cilek's professional interests are in clincal instruction/supervision in all disorder areas, with special interest in fluency. She also teaches a course in remedial methods of speech and hearing disorders in the public schools.

 

Email: kay-gfeller@uiowa.edu
2040 Voxman Music Building
319 / 335-1657

Joint Appointment
UI School of Music

Professional Interests
Kate Gfeller is director of graduate studies in the Music Therapy area in the School of Music, and holds a secondary appointment in the Department of Speech Pathology and Audiology. Her research focuses on perception of and affective response to music, more specifically in persons with disabilities.

She is also a member of the Iowa Cochlear Implant Team at the University of Iowa Hospitals and Clinics, Department of Otolaryngology. As Principal Investigator for the Music Perception Project, she investigates musical perception and enjoyment by deafened adults who use cochlear implants. She has also been involved in applied research and clinical protocols for aural rehabilitation of children and adults who are deaf or hard of hearing and music therapy practices for adults with Alzheimer's Disease.

Email: ann-fennell@uiowa.edu
115 Speech & Hearing Center
319 / 335-8727

Ann Fennell is a clincal instructor/supervisor with specialty training in voice and voice disorders. She has considerable experience working with professional voice users, including broadcasters, teachers and singers. She also co-teaches the voice disorders course.

Email: eileen-finnegan@uiowa.edu
127-D Speech & Hearing Center
319 / 335-8717

Professional interests
Eileen Finnegan's research is in the area of laryngeal neurophysiology. More specifically, my interest is in studying the role of laryngeal/respiratory reflexes during phonation.

Publications
Finnegan EM,Luschei ES,Barkmeier JM,Hoffman HT,Synchrony of laryngeal muscle activity in persons with vocal tremor. Archives of Otolaryngology--head & Neck Surgery. 129(3):313-8. March 2003.

Van Daele DJ,Finnegan EM,Rodnitzky RL,Zhen W,McCulloch TM,Hoffman HT,Head and neck muscle spasm after radiotherapy: management with botulinum toxin A injection. Archives of Otolaryngology--head & Neck Surgery. 128(8):956-9. Aug 2002.

Titze, I.R,Finnegan, E.M,Laukkanen, A.M,Jaiswal, S,Raising Lung Pressure and Fo in Vocal Warm-Ups: The Use of Flow-Resistant Straws. Journal of Singing. 58:329-338. 2002.

Finnegan EM,Luschei ES,Hoffman HT,Modulations in respiratory and laryngeal activity associated with changes in vocal intensity during speech. Journal of Speech, Language, and Hearing Research: Jslhr. 43(4):934-50. August 2000.

Finnegan EM,Luschei ES,Hoffman HT,Estimation of alveolar pressure during speech using direct measures of tracheal pressure. Journal of Speech, Language, and Hearing Research: Jslhr. 42(5):1136-47. October 1999.

Finnegan EM,Luschei ES,Gordon JD,Barkmeier JM,Hoffman HT,Increased stability of airflow following botulinum toxin injection. Laryngoscope. 109(8):1300-6. August 1999.

Scherer RC,Alipour F,Finnegan E,Guo CG,The membranous contact quotient: a new phonatory measure of glottal competence. Journal of Voice. 11(3):277-84. September 1997.

Alipour F,Scherer RC,Finnegan E,Pressure-flow relationships during phonation as a function of adduction. Journal of Voice. 11(2):187-94. June 1997.

Finnegan EM,Luschei ES,Barkmeier JM,Hoffman HT,Sources of error in estimation of laryngeal airway resistance in persons with spasmodic dysphonia. Journal of Speech and Hearing Research. 39(1):105-13. February 1996.

Luschei ES, Finnegan EM,Electromyographic techniques for the assessment of motor speech disorders, M.R. McNeil (Ed.). Clinical management of sensorimotor speech disorders. 149-176. 1996.

Min YB,Finnegan EM,Hoffman HT,Luschei ES,McCulloch TM,A preliminary study of the prognostic role of electromyography in laryngeal paralysis. Otolaryngology - Head and Neck Surgery. 111(6):770-5. December 1994.

Min YB,Luschei ES,Finnegan EM,McCulloch TM,Hoffman HT,Portable telemetry system for electromyography. Otolaryngology - Head and Neck Surgery. 111(6):849-52. December 1994.

Karnell MP,Finnegan EM,Tools for voice measurement. Current opinion in Otolaryngology & Head and Neck Surgery. 2:240-246. 1994.

Lavertu P, Scott SE, Finnegan EM, Levine HL, Tucker HM, Wood BG, Secondary tracheoesophageal puncture for voice rehabilitation after laryngectomy. Archives of Otolaryngology--head & Neck Surgery. 115(3):350-5. March 1989.

Email: Stephanie-Fleckenstein@uiowa.edu
120-A Speech & Hearing Center
319 / 335-8755

Stephanie Fleckenstein's professional interests are hearing aids and aural rehabilitation with special interest in pediatric amplification.

Email: lina-reiss@uiowa.edu
Office: 336G Speech & Hearing Center
Lab: 227 Speech & Hearing Center
Phone: 319/335-8787 (lab)

Research Interests
Auditory prostheses, speech in background noise, sound localization

Member of the Delta Center

Publications
Young, E.D., Yu, J.J., and Reiss, L.A.J. (2005)  Nonlinearities and the representation of auditory spectra.  In: "Auditory Spectral Processing, Vol. 70" (MS Malmierca and DRF Irvine, Eds.), pp.135-168, Elsevier Academic Press: London.
 
Reiss, L.A.J., and Young, E.D. (2005) Spectral edge sensitivity in neural circuits of the dorsal cochlear nucleus.  J. Neurosci.  25(14): 3680-3691.
 
Graziano, M.S.A., Reiss, L.A.J., and Gross, C.G. (1998) A neuronal representation of the location of nearby sounds. Nature 397, 428-430.  

Email: jean-k-gordon@uiowa.edu
125-B Speech & Hearing Center
319 / 335-8729

Research
My research focuses on the process of word retrieval in normal speakers, and in speakers with acquired neurogenic language disorders (particularly aphasia). I am interested in exploring the factors which make words easier or harder to retrieve, and how these factors influence the production of speech errors. To investigate these questions, I use a combination of behavioural experimentation and computational modeling approaches.

Member of the Delta Center

Selected Publications
Gordon, J.K. (in press). A quantitative analysis of picture description. Aphasiology.

Dell, G.S., Lawler, E.N., Harris, H.D. & Gordon, J.K. (2004). Models of errors of omission in aphasic naming. Cognitive Neuropsychology, 21(2/3/4), 125-145 .

Gordon, J.K. & Dell, G.S. (2003). Learning to divide the labor: An account of deficits in light and heavy verb production, Cognitive Science , 27(1), 1-40 .

Gordon, J.K. (2003). Review of Assessment of Aphasia , 2003, O. Spreen & A.H. Risser, Oxford University Press: New York , NY . Clinical Neurophysiology , 115, 242-244 .

Dell, G.S. & Gordon, J.K. (2003). Neighbors in the lexicon: Friends or foes? In Phonetics and phonology in language comprehension and production: Differences and similarities, N.O. Schiller and A.S. Meyer (eds), New York , NY : Mouton de Gruyter.

Gordon, J.K. (2002). Phonological neighborhood effects in aphasic speech errors: Spontaneous and structured contexts, Brain and Language, 82, 113-145 .

Baum, S.R., Pell, M.D., Leonard, C.L. & Gordon, J.K. (2001). Using prosody to resolve temporary syntactic ambiguities in speech production: Acoustic data on brain-damaged speakers, Clinical Linguistics & Phonetics, 15(6), pp. 441-456.

Gordon, J.K. (1999). Clinical forum: Can learning theory teach us about aphasia therapy? (a reply to Ferguson ), Aphasiology , 13(2), pp. 134-140.

Gordon, J.K. (1998). The fluency dimension in aphasia. Aphasiology, 12(7/8), 673-688 .

Gordon, J.K. (1998). Clinical forum: A meta-theory of aphasiology: Deficit or asset? (a reply to Petheram & Parr), Aphasiology, 12(6), 468-473.

Baum, S.R., Pell, M.D., Leonard, C. & Gordon, J.K. (1997). The ability of right- and left-hemisphere-damaged individuals to produce and interpret prosodic cues marking phrase boundaries. Language and Speech, 40(4), 313-330 .

Gordon, J.K. (1997). Bridging the gap between theory and practice...or burning our bridges? Aphasiology, 11(9), 845-854 .

Gordon, J. K. & Baum, S. R. (1994). Rhyme priming in aphasia: The role of phonology in lexical access. Brain and Language, 47, 661-683.

Email: melissa-duff@uiowa.edu
121-D Speech & Hearing Center
319-384-4702

Research
Melissa Duff's research interests include the cognitive processes and neural substrates supporting real-world learning, complex communication, and social interaction.

Selected publications
Duff, M. C. (2009, July 14). Management of sports-related concussion in children and adolescents. The ASHA Leader , 14(9), 10–13.

Duff, M.C ., Hengst, J., Tranel, D., & Cohen, N.J. (2009). Hippocampal amnesia disrupts verbal play and the creative use of language in social interaction. Aphasiology , 23 (7), 926-939.

Gupta, R., Duff, M.C., Denburg, N.L., Cohen, N.J., Bechara, A. & Tranel, D. (2009). Declarative memory is critical for sustained advantageous complex decision-making. Neuropsychologia, 47(7), 1686–1693.

Duff, M.C., Wszalek, T., Tranel, D., & Cohen, N.J. (2008). Successful life outcome and management of real-world memory demands despite profound anterograde amnesia. Journal of Clinical and Experimental Neuropsychology , 30 (8), 931-945.

Duff, M.C., Hengst, J., Tengshe, C., Krema, A. Tranel, D., & Cohen, N.J. (2008). Hippocampal amnesia disrupts the flexible use of procedural discourse in social interaction. Aphasiology , 22 (7, 8), 866-880 .

Duff, M.C., Hengst, J., Tranel, D., & Cohen, N.J. (2008). Collaborative discourse facilitates efficient communication and new semantic learning in amnesia. Brain and Language , 106 (1), 41-54.

Hengst, J., Duff, M.C., & Prior, P. (2008). Multiple voices in clinical discourse and as clinical intervention. International Journal of Language and Communication Disorders, 43, 58-68 .

Duff, M.C., Hengst, J., Tranel, D., & Cohen, N.J. (2007). Talking across time: Using reported speech as a communicative resource in amnesia. Aphasiology, 21 (6, 7, 8), 702-716.

Hengst, J. & Duff, M.C. (2007). Clinicians as communication partners: Developing a mediated discourse elicitation protocol. Topics in Language Disorders , 27, 36-47.

Duff, M.C., Hengst, J., Tranel, D., & Cohen, N.J. (2006). Development of shared information in communication despite hippocampal amnesia. Nature Neuroscience , 9 (1), 140-146.

Duff, M.C., Proctor, A., & Haley, K. (2002). Mild traumatic brain injury (TBI): Assessment and treatment procedures used by speech-language pathologists (SLPs). Brain Injury, 16 (9), 773-787.

Email: lenore-holte@uiowa.edu
148 Center for Disabilities & Development
319 / 356-1168

Research Interests
Lenore Holte's professional interests include the hearing assessment of children and adults with disabilities, immittance audiometry, and newborn hearing screening.

Publications
Holte, Prickett, Van Dyke, Olson, Lubrica, Knutson, Knutson, and Brennan (2006). Issues in the management of infants and young children who are deaf-blind, Infants and Young Children, 19, 4, 323 - 322.

Holte, Prickett, Van Dyke, Olson, Lubrica, Knutson, Knutson, and Brennan (2006). Issues in the evaluation of infants and young children who are suspected of or who are deaf-blind, Infants and Young Children, 19, 3, 213 – 227.

Holte, L.A. (2003). Early childhood hearing loss: A frequently overlooked cause of speech and language delay, Pediatric Annals, June 2003.

Margolis, RH., Bass-Ringdahl, S., Hanks, W.D., Holte, L., and Zapala, D.A. (2003). Tympanometry in newborn infants - 1kHz Norms. Journal of the American Academy of Audiology, 14, 7, 383-392.

Downey, D., Mraz, R., Knott, J., Knutson, C., Holte, L., and Van Dyke, D. (2002). Diagnosis and evaluation of children who are not talking. Infants and Young Children, 15, 38-48.

Holte, L.A. and Margolis, R.H. (2002). Contemporary research in tympanometry, Current Opinion in Otolaryngology, October 2002.

Bentler, R., Holte, L.A., Turner, C.W. (1999). An update on the acclimatization issue, Hearing Journal, 52,44-46.

Holte, L. A. (1996). Aging effects in multifrequency tympanometry. Ear and Hearing, 17, 12-18.

Holte, L. A., Margolis, R.H., Cavanaugh, R.M. (1991). Developmental changes in multifrequency tympanograms. Audiology, 30,1-24.

Holte, L.A., Cavanaugh, R.M., and Margolis, R.H. (1990). Ear canal wall mobility and tympanometric shape in young infants. Journal of Pediatrics. 77-80.

Holte, L.A. and Margolis, R.H. (1987). Screening tympanometry. Seminars in Hearing, 8, 329-338.

Holte, L.A. and Margolis, R.H. (1987). The relative loudness of third-octave bands of speech. Journal of the Acoustical Society of America. 81, 186-190.

Turner, C.W. and Holte, L.A. (1987). Discrimination of spectral peaks by normal and hearing impaired subjects. Journal of the Acoustical Society of America, 81, 445-451.

Turner, C.W. , Holte, L.A., and Relkin, E. (1987) Auditory filtering and the discrimination of spectral shapes by normal and hearing impaired subjects. Journal of Rehabilitation Research and Development, Fall, 1987, 229-238.

Turner, C.W. and Holte, L.A. (1985). Evaluation of FM amplification systems. Hearing Instruments, 36, 7, 612.

Email: richard-hurtig@uiowa.edu
120-B Speech & Hearing Center
319 / 335-8730

Research
Richard Hurtig's broad research interest is uncovering general invariants of perceptual and cognitive processes involved in human communication.

Laboratory website

Class websites
003:117 Psychology of Language

003:218 Psycholinguistics

Inventions and Patents
Hurtig, R.R., & Turner, C. (2003). Apparatus and Methods for Proportional Audio Compression and Frequency Shifting. U.S. Patent # 6577739, The University of Iowa.

Hurtig, R.R., & Clark, B. (1987). Broadband spectral compression (for sensory aids and signal transmission system). The University of Iowa .

Selected publications
Downey, D & Hurtig, RR (2003). Augmentative & Alternative Communication. Pediatric Annals, 32(7):467-474.

Roch, Marie, Hurtig, RR (2002). The Integral Decode: A Smoothing Technique for Robust HMM-Based Speaker Recognition. IEEE Transactions on Speech & Audio Processing, 10(5):315-324.

O'Leary, DS, Block, RI, Koeppel, JA, Flaum, M, Schultz, SK, Andreasen, NC, Boles Ponto, L, Watkins, GL, Hurtig, RR, & Hichwa, RD (2002). "Effects of Smoking Marijuana on Brain Perfusion & Cognition." Neuropsychopharmacology, 26:802-816.

Block, RI, O'Leary, DS, Hichwa, RD, Augustinack, JC, Boles Ponto, LL, Ghoneim, MM, Arndt, S, Hurtig, RR, et. al (2002). Effects of frequent marijuana use on memory-related regional cerebral blood flow. Pharmacology, Biochemistry & Behavior (72)1:1-14.

Turner, CW & Hurtig, RR (1999). Proportional frequency compression of speech for listeners with sensorineural hearing loss. J.Acoust. Society of America , 106(2):877-886.

Narayana, S., Hichwa, R.D., Ponto, L.L.B., Hurtig, R.R. and Watkins, G.L. (1997). Construction of a whole body blood flow model for use in positron emission tomography imaging with [ 15 O] Water. J of Pharmacokinetics & Biopharm. , Vol. 25 (5).

O'Leary, D.S., Andreasen, N.C., Hurtig, R.R., et al (1997). Auditory and visual attention assessed with PET. Human Brain Mapping, (5):422-436.

Flaum, M., Cizadlo, T., Arndt, S., O'Leary, D.S., Nopoulos, P., Hurtig, R., et. al. (1996). Informing the choice of activiation thresholds in fMRI paradigms. NeuroImage , (3):S59.

O'Leary, D.S., Andreasen, N.C., Hurtig, R.R., Kesler, M.L., Rogers, M., Arndt, S., Cizadlo, T., Watkins, G.L., Ponto, L.L.B., Kirchner, P.T., Hichwa, R.D. (1996). Auditory attentional deficits in patients with schizophrenia: A positron emission tomography (PET) study. Archives of General Psychiatry, 53: 633-641.

Andreasen, N.C., O'Leary, D.S., Arndt, S., Cizadlo, T., Hurtig, R., Rezai, K., Watkins. G.L., Ponto, L.L.B., & Hichwa, R.D. (1996). Neural substrates of facial recognition. J. Neuropsychiatry Clin Neurosci, 8(2): 139-146.

O'Leary, D.S., Hurtig, R.R., Hichwa, R.D., Watkins, G.L., Boles Ponto, L.L., Rogers, M., Kirchner, P.T., & Andreasen , N.C. A Positron Emission Tomography study of binaurally- and dichotically- presented stimuli: Efffects of level of language and directed attention. Brain & Language , (53):20-39, 1996.

Hichwa, RD, O'Leary, DS, Ponto, LLB, Arndt, S, Cizadlo, T, Hurtig, RR, et al (1995). Count vs. Flow: When does it matter? In Quantification of Brain Function Using PET. T Jones, V Cunningham, R Myers & D Bailey (Eds.). New York , NY : Academic Press.

Andreasen, N.C., O'Leary, D.S., Arndt, S., Cizadlo, T., Hurtig, R., Rezai, K., Watkins, G.L., Ponto, L.B., Hichwa, R.D. (1995). Neural substrates of facial recognition. Human Brain Mapping, (Suppl), 1 , 31.

Andreasen, N.C., O'Leary, D.S., Arndt, S., Cizadlo, T., Hurtig, R.R., Rezai, K, Watkins, G.L, Ponto, L.B., and Hichwa, R.D. (1995). Short-term and long-term verbal memory: A positron emission tomography study. Proceedings of National Academy of Science, 92 , 5111-5115.

Hurtig, R.R., Hichwa, R.D., O'Leary, D.S., et al. (1994). The effects of the timing and duration of cognitive activation in [ 15 O]water PET studies. Journal of Cerebral Blood Flow and Metabolism , 14 (3), 423-430.

Kirk, K.I., Tye-Murray, N., & Hurtig, R.R. (1992). The use of static and dynamic vowel cues by multichannel cochlear implant users. Journal of The Acoustical Society of America , 91 (6), 3487-3498.

Rizzo, M., & Hurtig, R. (1992). Visual search in hemineglect: What stirs idle eyes? Clinical Vision Science , 7 (1), 39-52.

Hurtig, R.R. (1991). Perception of spectrally compressed speech. Proceedings of the XIIth International Congress of Phonetic Sciences , 2 , 98-101.

Rizzo, M., & Hurtig, R.R. (1989). The effect of bilateral visual cortex lesions on the development of eye movements and perception. Neurology , 39 , 406-413.

Zimmermann, G.N., Brown, C.J., Kelso, J.A.S., Hurtig, R.R., & Forrest, K. (1988). The association between acoustic and articulatory events in a delayed auditory feedback (DAF) paradigm. Journal of Phonetics , 16 , 437-451.

Rizzo, M., Hurtig, R.R., & Damasio, A.R. (1987). The role of scanpaths in facial recognition and learning. Annals of Neurology , 22 (1), 41-45.

Rizzo, M., & Hurtig, R.R. (1987). Looking but not seeing: Attention, perception and eye movements in simultanagnosia. Neurology , 37 (10), 1642-1648.

Keidar, A., Hurtig, R.R., & Titze, I.R. (1987). The perceptual nature of vocal register change. Journal of Voice , 1 (3), 223-233.

Broselow, E., Hurtig, R.R., & Ringen, C. (1987). The perception of second language prosody. In G. Ioup & S. Weinberger (Eds.), Interlanguage Phonology: The acquisition of a second language sound system . Cambridge , MA : Newbury House.

Collins, M.J., & Hurtig, R.R. (1986). Evaluation of prosthetic devices, in Glattke, T., Collins, M.J., & Harker, L.A. (Eds.), Sensorineural Hearing Loss: Mechanism, Diagnosis and Treatment, Proceedings of the Scott N. Reger Memorial Conference, University of Iowa Press, 277-289.

Collins, M.J., & Hurtig, R.R. (1985). Categorical perception of speech sounds via the tactile modes. Journal of Speech and Hearing Research , 28 (4), 594-598.

Brown, C.J., & Hurtig, R.R. (1983). Children's discourse competence: An evaluation of the development of inferential processes, Discourse Processes: A Multidisciplinary Journal , 6 , 353-375.

Hurtig, R.R. (1982). Cerebral asymmetry in the strategies used in processing random line stimuli, Cortex , 18 , 332-343.

Hurtig, R.R. (1982). Analytic and holistic strategies in the perception of sign, Journal of Visual/Verbal Languaging , 1 (1), 31-36.

Hurtig, R.R., Ensrud, S., & Tomblin, J.B. (1982). The communicative function of question production in autistic children. Journal of Autism and Developmental Disorders , 12 (1), 57-69.

Cirrin, F., & Hurtig, R.R. (1981). Accessing mental representations in retarded children. American Journal of Mental Deficiencies , 86 (2), 188-193.

Dunlap, G.L., & Hurtig, R.R. (1981). Effects of clausal structure and word frequency in sentence processing. Journal of Psycholinguistic Research , 10 (3), 313-326.

Hurtig, R.R. (1978). The validity of clausal processing strategies at the discourse level. Discourse Processes: A Multidisciplinary Journal , 1 (2), 195-202.

Hurtig, R.R. (1977). Toward a functional theory of discourse. In R.O. Freedle (Ed.), Discourse production and comprehension . Norwood , NJ : Ablex.

Bever, T.G., Hurtig, R.R., & Handel, A.B. (1976). Analytic processing elicits right ear superiority in monaurally presented speech. Neuropsychologia , 14 , 175-181.

Bever, T.G., Garrett, M.F., & Hurtig, R.R. (1976). Projection mechanisms in reading, or when the journal review process fails. Journal of Psycholinguistic Research , 5 (2), 215-226.

Bever, T.G., Carroll, J.E., & Hurtig, R.R. (1976). Analogy or ungrammatical sequences that are utterable and comprehensible are the origins of new grammars in language acquisition and linguistic evolution. In T.G. Bever, J.J. Katz, & D.T. Langendoen (Eds.), An integrated theory of linguistic ability . New York : Crowell Press.

Bever, T.G., & Hurtig, R.R. (1975). Detection of a non-linguistic stimulus is poorest at the end of a clause. Journal of Psycholinguistic Research , 4 (1), 1-7.

Bever, T.G., Garrett, M.F., & Hurtig, R.R. (1973). The interaction of perceptual processes and ambiguous sentences. Memory and Cognition , 1 (3), 277-286.

Email: sally-junkins@uiowa.edu
120-C Speech & Hearing Center
319 / 335-8207

Professional Interests
Sally Junkins is a clincal instructor/supervisor in Wendell Johnson Speech and Hearing Clinic.

Email: michael-karnell@uiowa.edu
125-D Speech & Hearing Center
319 / 335-6629

Joint appointment
Department of Otolaryngology-Head & Neck Surgery

Related Websites
Department of Otolaryngology-Head & Neck Surgery
Michael Karnell's full CV
Otolaryngology Voice and Swallowing Research Center

Research interests
Normal and disordered laryngeal physiology and voice production, velopharyngeal physiology and resonance disorders with special interest in cleft palate and swallowing disorders.

Publications
Karnell, M.P., Schultz, K., Canady, J. Investigations of a Pressure Sensitive Theory of Marginal Velopharyngeal Inadequacy. Cleft Palate-Craniofacial J., 38, 345-357, 2001

Hoffman, H.T., Overholt, E., Karnell, M., McCulloch, T.M. Vocal process granuloma, Head and Neck, 23, 1060-1072, 2001.

Hoffman, H., McCabe, D., McCulloch, T., Jin, Sung M., Karnell, Michael. Transoral Laryngeal Collagen Injection as an Adjunct to Medialization Laryngoplasty. Laryngoscope, 112(8 Pt 1):1407-1413, 2002 August.

Johnson, L., Karnell, M., and Bailey, P. Using the Web to Enhance Communication between Cleft Palate Specialists and Community Practitioners. Journal of Dental Education. 66:2, #82, 2002.

Canady, J.W., Cable, B.B., Karnell, M.P., Karnell, L.H. Pharyngeal flap surgery: Protocols, complications, and outcomes at the University of Iowa. Otolaryngology-Head and Neck Surgery, 129, 321-326, 2003.

Karnell, M.P., Hansen, J., Hardy, J.C., Lavelle, W.L., Markt, J. Nasality ratings and nasalance measurements as outcome indicies for palatal lift management. Journal of Medical Speech Pathology, 12, 21-29, 2004.

Chang, A., Karnell, M.P. The relationship among vocal fatigue, perceived phonatory effort and phonation threshold pressure. In press Journal of Voice, 2004

Smith C., Finnegan E., Karnell M.P. Resonant Voice: Spectral and Nasendoscopic Analysis. Journal of Voice, In press.

Books
Textbook Handbook of Cleft Palate Speech: A Clinician's Guide to Diagnosis and Therapy. Peterson-Falzone, S.J., Karnell, M.P., Hardin-Jones, M.A., Cardamone, J.E. Mosby, Due: 2004.

Textbook. Peterson-Falzone, S.J., Karnell, M.P., Hardin-Jones, M.A. Cleft Palate Speech. Mosby, 2001.

Textbook. Karnell, M.P. Videoendoscopy: From Velopharynx to Larynx. Singular Publishing Group, 1994.

Email: danielle-kelsay@uiowa.edu
113 Speech & Hearing Center
319 / 335-8754

Clinical/Research Interests
Hearing impairment, its impact on the pediatric population and provision of comprehensive aural (re)habilitation services to hearing impaired children and their families

Publications
Hughes, M.L., Vander Werff, K.R., Brown, C.J., Abbas, P.J., Kelsay, D.M.R., Teagle, H.F.B. & Lowder, M.W. (2001). A Longitudinal Study of Electrode Impedance, the Electrically Evoked Compound Action Potential, and Behavioral Measures in Nucleus 24 Cochlear Implant Users. Ear and Hearing, 22, 471-486.

Spencer, L.J., Tye-Murray, N., Kelsay, D.M.R., Teagle, H. (1998). Learning to use the cochlear implant: A child who beat the odds. American Journal of Audiology, 7, 1, 24-29.

Fryauf-Bertschy, H., Tyler, R.S., Kelsay, D.M.R., Gantz, B.J. & Woodworth, G.P. (1997). Cochlear implant use by prelingually deafened children: The influences of age at implant and length of device use. Journal of Speech and Hearing Research, 40, 183-199.

Kelsay, D.M.R. & Tyler, R. (1996). Advantages and Disadvantages Expected and Realized by Pediatric Cochlear Implant Recipients as Reported by Their Parents. American Journal of Otology, 17, 866-873.

Kelsay, D.M.R. & Tyler, R. (1996). Children and Cochlear Implants, in Hearing Care for Children, (Martin, F. & Clark, J., Eds.). Allyn & Bacon.

Tye-Murray, N., Witt, S., Schum, L., Kelsay, D., & Schum, D. (1994). Feasible Aural Rehabilitation Services for Busy Clinical Settings. American Journal of Audiology, 3, 3, 33-37.

Brown, C.J., Abbas, P.J., Fryauf-Bertschy, H., Kelsay, D. & Gantz, B.J. (1994). Intraoperative and postoperative electrically evoked auditory brain stem responses in Nucleus cochlear implant users: Implication for the fitting process. Ear and Hearing, 15, 168-176.

Tye-Murray, N. & Kelsay, D.M.R. (1993). A communication training program for parents of cochlear implant users. Volta Review, 95, 22-31.

Fryauf-Bertschy, H., Tyler, R.S., Kelsay, D.M. & Gantz, B.J. (1992). Performance over time of congenitally deaf and postlingually deafened children using a multichannel cochlear implant. Journal of Speech and Hearing Research, 35, 4, 913-920.

Tyler, R.S. & Kelsay, D.M. (1990). Advantages and disadvantages reported by some of the better cochlear implant patients. American Journal of Otology, 11, 4, 282-289.

Email: linda-louko@uiowa.edu
116-A Speech & Hearing Center
319 / 335-8698

Link to Dr. Louko's CV (in pdf)

Email: karla-mcgregor@uiowa.edu
121-C Speech & Hearing Center
319 / 335-8724

Research
Dr. McGregor is interested in how children learn words. To address this question, she explores individual differences in word learning by comparing children with specific language impairment or autism to children who are developing normally. She has also explored variation within the population of normal learners including comparisons of children developing at a typical rate and those who are very precocious and comparisons of children from different language communities.

Laboratory website
Word Learning Lab

Member of the Delta Center

Selected publications
McGregor, K.K., Sheng, Li, & Smith, B. (in press). The precocious two-year-old: Status of the lexicon and links to the grammar. Journal of Child Language.

McGregor, K.K. & Capone, N.C. (2004). Genetic and environment interactions in determining the early lexicon: Evidence from a set of tri-zygotic quadruplets. Journal of Child Language, 31, 311-337.

Capone, N.C. & McGregor, K.K. (2004). Gesture development: A review for clinicians and researchers. Journal of Speech, Language, and Hearing Research, 47, 173-186.

Sheng, L., McGregor, K.K., & Xu, Y. (2003). Prosodic and lexical-syntactic aspects of the therapeutic register. Clinical Linguistics and Phonetics, 17, 355-363.

McGregor, K.K., Newman, R.M., Reilly, R.M., and Capone, N. (2002). Semantic representation and naming in children with specific language impairment. Journal of Speech, Language, and Hearing Research, 45, 998-1014.

McGregor, K.K. and Appel, A. (2002). On the relation between mental representation and naming in a child with specific language impairment. Clinical Linguistics and Phonetics, 16, 1-20.

McGregor, K.K., Friedman, R.M., Reilly, R.M., and Newman, R.M. (2002). Semantic representation and naming in young children. Journal of Speech, Language, and Hearing Research, 45, 332-346.

Kim, M, McGregor, K.K., and Thompson, C.K. (2000). Early lexical development in English- and Korean-speaking children: Language-general and language-specific patterns, Journal of Child Language, 27, 225-254.

Gerken, L. and McGregor, K.K. (1998). An overview of prosody and its role in normal and disordered child language. American Journal of Speech-Language Pathology, 7, 38-48.

Email charles-miller@uiowa.edu
C-216 University Hospitals & Clinics
319 / 356-4758

Email: jerald-moon@uiowa.edu
122-E Speech & Hearing Center
319 / 335-8722

Research
Research interests: Speech aerodynamics, velopharyngeal function, and articulatory coordination.

Class websites
003:110 Phonetics: Theory and Applications
003:112 Anatomy and Physiology of Speech Production

Selected publications
Kuehn, D. and Moon, J. (1999) Induced fatigue effects on velopharyngeal closure force. Jour. Speech Hear. Res. , in press.

Berry, D., Moon, J., and Kuehn, D. (1999) A histologically-based finite element model of the soft palate. Cleft Palate-Cranio. Jour., 36, 217-223.

Moon, J., Thompson, S., Jaeckel, E., and Canady, J. (1998) Muscle fiber type distribution in the normal human levator veli palatini muscle. Cleft Palate-Cranio. Jour., 35, 419-424.

Barsoumian, R., Kuehn, D., Moon, J., and Canady, J. (1998) An anatomic study of the tensor veli palatini and dilatator tubae muscles in relation to eustachain tube and velar function. Cleft Palate - Cranio. Jour.,35, 101-110.

Kuehn, D., and Moon, J. (1997) Velopharyngeal closure force and levator veli palatini activation levels in relation to varying phonetic contexts. Jour. Speech Hear. Res. , 41, 51-62.

Kuehn, D., and Moon, J. (1995) Levator veli palatini muscle activity in relation to intraoral air pressure variation in cleft palate subjects. Cleft Palate-Cranio. Jour., 32, 376-381.

Moon, J., and Canady, J. (1995). Effects of gravity on velopharyngeal muscle activity during speech. Cleft Palate-Cranio. Jour., 32, 371-375.

Canady, J., Thompson, S., Moon, J., & Glowacki, R. (1995). Augmentation of oral tissues in the rabbit using autogenous fat. Cleft Palate - Cranio. Jour., 32, 1-6.

Kuehn, D., & Moon, J. (1994) Levator veli palatini muscle activity in relation to intraoral air pressure variation. Jour. Speech Hear. Res., 37., 1260-1270.

Moon, J., Kuehn, D., and Huisman, J. (1994) Measurement of velar closure force during vowel production. Cleft Palate-Cranio. Jour., 31, 356-363.

Email: diane-niebuhr@uiowa.edu
122-C Speech & Hearing Center
319 / 335-8743

Professional interests
Diagnostic audiology and aural rehabilitation with a special interest in hearing aids and rehabilitation of adults with acquired hearing loss.

 

Email: amanda-owen@uiowa.edu
121-A Speech & Hearing Center
319 / 335-6951

Lab website
Grammar Acquisition Lab

Research
My primary research interests lie in complex sentence production and comprehension in typically developing children and children with Specific Language Impairment. I am particular interested in exploring the linguistic factors that influence difficulties with grammatical accuracy. As a secondary focus, I am interested in differentiating between actual linguistic knowledge (competence) and language production abilities (performance) in children.

Member of the Delta Center

Publications
Owen, A.J. & Goffman, L. (in press). Acoustic correlates of finiteness in the speech of children with specific language impairment and their typically developing peers. Clinical Linguistics & Phonetics.

Owen, A.J. & Leonard, L.B. (in press). The overgeneralization of nonfinite complements to finite contexts: The case of decide. Journal of Child Language.

Leonard, L.B., Deevy, P., Kurtz, R., Krantz, L., Owen, A.J,. Polite, E, Elam, D., Finneran, D. (in press) Lexical aspect and the use of verb morphology by children with specific language impairment. Journal of Speech, Language, & Hearing Research.

Owen, A.J. & Leonard, L.B. (2006). The production of finite and nonfinite complement clauses by children with SLI and their typically developing peers. Journal of Speech, Language, & Hearing Research, 49, 526-547.

Owen, A. J. & Leonard, L.B. (2002). Lexical diversity in the spontaneous speech of children with specific language impairment: Application of D. Journal of Speech, Language, & Hearing Research, 45. 927-937.

Owen, A.J., Dromi, E, & Leonard, L.B. (2001). The phonology-morphology interface in the speech of Hebrew-speaking children with specific language impairment. Journal of Communication Disorders, 34. 323-337.

Leonard, L.B., Miller, C.A., & Owen, A.J. (2000). The comprehension of verb agreement morphology by English-speaking children with specific language impairment. Clinical Linguistics & Phonetics, 14. 465-481