Nichol Castro


Nichol Castro.

Nichol Castro


Nichol Castro



Dr. Castro is an Assistant Professor in the Department of Communicative Disorders and Sciences. She completed a B.A. in Psychology (with Honors) from the University of Colorado, Colorado Springs and completed a dual-title Ph.D. in Psychology (Cognitive) and Gerontology from the University of Kansas. She also completed a post-doctoral fellowship in Cognitive Aging at the Georgia Institute of Technology (NIA T32 AG000175) and a post-doctoral fellowship in Clinical Aphasiology at the University of Washington (NIDCD F32 DC017074).

Current Research

Successful word retrieval is critical to everyday communication. Word retrieval impairments are a pervasive symptom of aphasia, an early feature of Alzheimer’s disease and other dementia, and even a common complaint of typically aging adults.

Dr Castro’s research focuses on word retrieval in aging adults and adults with language impairments (e.g., aphasia, dementia), with a particular focus on how words are organized in memory. Her research uses behavioral studies and computational modeling 


  • CDS 151: Introduction to Speech-Language Pathology and Audiology
  • CDS 564: Adult Language Disorders

Recent and Select Publications

Ashaie, S., & Castro, N. (2021). Exploring the Complexity of Aphasia With Network Analysis. Journal of Speech, Language, and Hearing Research64(10), 3928-3941.

Castro N., Stella, M., & Siew, C. S. Q. (2020). Quantifying the interplay of semantics and phonology during failures of word retrieval by people with aphasia using a multiplex lexical network. Cognitive Science, 44(9), e12881.

Castro, N., Curley, T., & Hertzog, C. (2020). Category norms with a cross-sectional sample of adults in the United States: Cohort, age, and historical effects on semantic categories. Behavior Research Methods. Advance online publication. doi: 10.3758/s13428-020-01454-9

Castro, N. & Siew, C. S. Q. (2020). Contributions of modern network science to the cognitive sciences: Revisiting research spirals of representation and process. Proceedings of the Royal Society A, 476(2238), 20190825.

Vitevitch, M. S., & Castro, N. (2015). Using network science in the language sciences and clinic. International Journal of Speech-Language Pathology, 17(1), 13-25.