Staff Directory Contact Us

The Nathan S. Kline Institute for Psychiatric Research

Diana Sidtis, CCC/SPL, Ph.D.

Diana Sidtis, CCC/SPL, Ph.D.

Research Scientist, Brain & Behavior Laboratory Co-Director
Geriatric Psychiatry

Faculty Directory


Diana Van Lancker Sidtis holds a BA from the University of Wisconsin, Masters Degrees from the University of Chicago (Anglistics) and CSULA (Speech-Language Pathology), and a PhD (Linguistics) from Brown University. She was awarded an NIH Postdoctoral Fellowship in Communication Disorders at Northwestern University and is licensed as a Speech Pathologist. Her research examines speech and language behaviors in normal and neurologically impaired persons. Studies of voice perception led to a book coauthored with Jody Kreiman, Foundations of Voice Studies, which received the American Publishers Prose Award for 2011. She is active in mentoring doctoral students in research on voice, speech, and language in bilingualism, stroke, Parkinson’s and Alzheimer’s disease. Research in our laboratory includes speech and language function in persons diagnosed with Parkinson’s disease following treatment with deep brain stimulation (a medical therapy for movement disorders), Alzheimer’s disease, and schizophrenia. Our goal in designing and executing research studies is to describe brain processes underlying human behavior, leading to improved evaluation and informed treatment of persons with neurological impairments.

  • Approaches to intelligibility studies in deep brain stimulation. 2nd International Symposium on Basal Ganglia Speech Disorders and Deep Brain Stimulation, Aix-en-Provence, France, June 29-July 1, 2010.
  • Keynote speaker:  Gesellschaft für Aphasieforschung und –behandlung (Society for Aphasia Research and Treatment).  Neurologische Perspektive formelhafter Sprache (“Neurological perspectives on formulaic language”) (talk given in German). November 4-6, Münster, Germany, 2010.
  • Special panel on Motor Speech Disorders. American Speech-Language Hearing Association Annual Meeting # 1018. Current studies of speech in Parkinson’s disease.” November 15, 2012.  
  • Keynote speaker:  8th PPRU Workshop on Person Perception. Foundations of voice studies. October 10-11, University of Jena, Jena, Germany, 2013. 
  • Keynote speaker:  Department of Linguistics, University of Düsseldorf, Düsseldorf, Formulaic expressions:  identification, classification, utilization. Germany, January 12, 2016.
Select Publications

Van Lancker Sidtis, D., Cameron, K., & Sidtis, J. J. (2012).  Dramatic effects of speech task on motor and linguistic planning in severely dysfluent parkinsonian speech. Journal of Clinical Linguistics and Phonetics, 26, 695-711. PMID: 22774929

Van Lancker Sidtis, D., Cameron, K., Bonura, L., & Sidtis, J. J. (2011).  Speech intelligibility by listening in Parkinson speech with and without deep brain stimulation.  Journal of Neurolinguistics, 25 (2), 121-132. PMID: 21971352

Van Lancker Sidtis, D. & Kreiman, J. (2011). In the beginning was the familiar voice: Personally familiar voices in the evolutionary and contemporary biology of communication. Journal of Integrative Psychological and Behavioral Science, 46(2),146-59. (Article chosen for commendation by the Faculty of 1000 (F1000), placing it in 2% of published articles in biology and medicine.)  PMID: 21710374

Van Lancker Sidtis, D., Kempler, D., & Jackson, C. & Metter, E. J. (2010).  Prosodic changes in aphasic speech: Timing. Journal of Clinical Linguistics and Phonetics, 24(2),155-67. PMID: 20100044

Van Lancker Sidtis, D., Choi, J-H., Alken, A. & Sidtis, J. J. (2016).  Formulaic language in Parkinson’s and Alzheimer’s disease: Complementary effects of subcortical and cortical dysfunction. Journal of Speech Language and Hearing Disorders, 58(5), 1493-1507. PMID: 26183940