Naomi Chaytor, PhD, ABPP

• University of Victoria, BSc (Honours), with distinction
• Washington State University, PhD, Clinical Psychology
• Baylor College of Medicine, Predoctoral Internship, Clinical Neuropsychology
• University of Washington School of Medicine, Postdoctoral Fellowship, Clinical Neuropsychology and Rehabilitation Psychology

She is a licensed clinical psychologist and is Board Certified in Clinical Neuropsychology by the American Board of Professional Psychology. Prior to becoming a founding faculty member in the Elson S. Floyd College of Medicine in 2015, she was a practicing clinical neuropsychologist and faculty in the departments of Neurology and Physical Medicine and Rehabilitation at UW Medicine.

Her current research is focused on with the neuropsychology of type 1 diabetes, including 1) glycemic variability and cognitive performance, 2) diabetes-related and other risk factors for cognitive decline and dementia, and 3) cognitive, quality of life and emotional correlates of medical technology use in older adults (e.g., artificial pancreas, continuous glucose monitoring). 

In addition, she is interested in the use of cognition as a mediator/moderator of outcomes in clinical trials and the use of smartphones to collect neuropsychological data in clinical research. Previous work has included projects evaluating the validity of mobile cognitive assessment, testing the effectiveness of depression treatments in adults with epilepsy, characterizing neuropsychological and emotional functioning in epilepsy and psychogenic nonepileptic events, and improving neuropsychological prediction of real-world outcomes (i.e., ecological validity).

• Woman of the Year (2025), President’s Commission on the Status of Women, Washington State Univeristy 
• Outstanding Contribution to Equity (2023), Elson S. Floyd College of Medicine
• Chancellor’s Excellence in Research and Scholarship Award (2021), WSU Health Sciences
• Inaugural Fellow (2019), Steve Gleason Institute for Neuroscience, WSU Health Sciences

Selected publications. See all of Naomi’s research here.

• 2025

  1.      Mascarenhas Fonseca, L., *Hawks, Z.W., Schnaider Beeri, M., Jung, J., Kudva, Y., Rizvi, S., Bulger, J., Grinspoon, E., Janess, K., Sliwinski, M.J., Pratley, R.E., Rickels, M.R., Weinstock, R.S., Chhatwal, J.P., Kivisäkk, P., Germine, L.T., Chaytor, N.S. (In Press). Cognitive vulnerability to glucose fluctuations: a digital phenotype of neurodegeneration. Alzheimer’s & Dementia.

  2.      Kudva, Y. C., Henderson, R. J., Kanapka, L. G., Weinstock, R. S., Rickels, M. R., Pratley, R. E., Chaytor, N., Janess, K., Desjardins, D., Pattan, V., Peleckis, A. J., Casu, A., Rizvi, S. R., Bzdick, S., Whitaker, K. J., Jo Kamimoto, J. L., Miller, K., Kollman, C., & Beck, R. W. (2025). Automated Insulin Delivery in Older Adults with Type 1 Diabetes. NEJM evidence, 4(1), EVIDoa2400200. https://doi.org/10.1056/EVIDoa2400200

  3.      Jett JD, Tyutyunnyk D, Beck R, Palmer K, Ryan D, Sanchez J, Weeks DL, McPherson SM, Chaytor N, Kiluk B, Javors MA, Ginsburg BC, Murphy S, Hill-Kapturczak N, McDonell MG. A randomized controlled trial to assess whether a telehealth-based contingency management intervention reduces alcohol use for individuals with alcohol use disorder. Contemp Clin Trials. 2025 Mar;150:107807. doi: 10.1016/j.cct.2025.107807. Epub 2025 Jan 15. PubMed PMID: 39824379.

  4.      Kudva YC, Henderson RJ, Kanapka LG, Weinstock RS, Rickels MR, Pratley RE, Chaytor N, Janess K, Desjardins D, Pattan V, Peleckis AJ, Casu A, Rizvi SR, Bzdick S, Whitaker KJ, Kamimoto JLJ, Miller K, Kollman C, Beck RW. Automated Insulin Delivery in Elderly with Type 1 Diabetes: A Prespecified Analysis of the Extension Phase. Diabetes Technol Ther. 2025 Mar 11;. doi: 10.1089/dia.2024.0560. [Epub ahead of print] PubMed PMID: 40067490.

   

  2024

  3.      Keshtkar, M, Tyutyunnyk, D, King, P, Palmer, K, Brigman, M, Jett, JD, Beck, R, Parent, SC, Ries, R, McPherson, SM, Chaytor, NS, Roll, JM, Weeks, DL, McDonell, MG (2024). Covid-19 vaccination status and beliefs of individuals with co-occurring serious mental illness and alcohol use disorder, Drug and Alcohol Dependence Reports, 13. https://doi.org/10.1016/j.dadr.2024.100284 

  4.      Fonseca LM, Beeri MS, Hawks ZW, Jung L, Cleveland M, Delgado N, Bulger J, Grinspoon E, Janess K, Sliwinski MJ, Weinstock RS, Chhatwal JP, Kivisäkkc P, Germine LT, Chaytor NS. (In Press) ATN plasma biomarkers and cognitive variability in adults with type 1 diabetes. Alzheimers Dement (Amst)

  5.      Karger, A. B., Nasrallah, I. M., Braffett, B. H., Luchsinger, J. A., Ryan, C. M., Bebu, I., Arends, V., Habes, M., Gubitosi-Klug, R. A., Chaytor, N., Biessels, G. J., Jacobson, A. M., & DCCT/EDIC Research Group (2024). Plasma Biomarkers of Brain Injury and Their Association With Brain MRI and Cognition in Type 1 Diabetes. Diabetes Care, dc240229. Advance online publication. https://doi.org/10.2337/dc24-0229

  6.      Fonseca, L. M., Schmidt, J. J., Snoek, F. J., Weinstock, R. S., Chaytor, N., Stuckey, H., Ryan, C. M., & van Duinkerken, E. (2024). Barriers and Facilitators of Self-Management in Older People with Type 1 Diabetes: A Narrative Review Focusing on Cognitive Impairment. Diabetes, metabolic syndrome and obesity: targets and therapy, 17, 2403–2417. https://doi.org/10.2147/DMSO.S410363

  7.      Fonseca, L. M., Kanapka, L., Miller, K., Pratley, R., Rickels, M. R., Rizvi, S., Kudva, Y. C., Weinstock, R. S., & Chaytor, N. S. (2024). Risk factors associated with cognitive performance and cognitive impairment in older adults with type 1 diabetes: Data from the Wireless Innovation for Seniors with Diabetes Mellitus (WISDM) study. Journal of diabetes and its complications, 38(5), 108739. Advance online publication. https://doi.org/10.1016/j.jdiacomp.2024.108739 

  8.      Hawks, Z. W., Beck, E. D., Jung, L., *Fonseca, L. M., Sliwinski, M. J., Weinstock, R. S., Grinspoon, E., Xu, I., Strong, R. W., Singh, S., Van Dongen, H. P. A., Frumkin, M. R., Bulger, J., Cleveland, M. J., Janess, K., Kudva, Y. C., Pratley, R., Rickels, M. R., Rizvi, S. R., #Chaytor, N.S. & #Germine, L. T. (2024). Dynamic associations between glucose and ecological momentary cognition in Type 1 Diabetes. NPJ digital medicine, 7(1), 59. https://doi.org/10.1038/s41746-024-01036-5 

  9.      Fonseca LM, Finlay MG, Chaytor NS, Morimoto NG, Buchwald D, Van Dongen HPA, Quan SF and Suchy-Dicey A (2024) Mid-life sleep is associated with cognitive performance later in life in aging American Indians: data from the Strong Heart Study. Front. Aging Neurosci. 16:1346807. doi: 10.3389/fnagi.2024.1346807

  10.  Zuniga-Kennedy, M., Wang, O. H., Fonseca, L. M., Cleveland, M. J., Bulger, J. D., Grinspoon, E., Hansen, D., Hawks, Z. W., Jung, L., Singh, S., Sliwinski, M., Verdejo, A., Miller, K. M., Weinstock, R. S., Germine, L.#, & Chaytor, N.# (2024). Nocturnal hypoglycemia is associated with next day cognitive performance in adults with type 1 diabetes: Pilot data from the GluCog study. The Clinical neuropsychologist, 1–20. Advance online publication. https://doi.org/10.1080/13854046.2024.2315749

  11.  Lu, T. T., Parent, S. C., Chaytor, N., Amiri, S., Palmer, K., McPherson, S., Jett, J., Ries, R., McDonell, M. G., & Murphy, S. M. (2024). Budget Impact Tool for Implementing Contingency Management for Co-occurring Alcohol Use Disorders and Serious Mental Illness. Psychiatric services (Washington, D.C.), 75(4), 326–332. https://doi.org/10.1176/appi.ps.20220547 

  2023

  12.  Mascarenhas Fonseca, L., Strong, R. W., Singh, S., Bulger, J. D., Cleveland, M., Grinspoon, E., Janess, K., Jung, L., Miller, K., Passell, E., Ressler, K., Sliwinski, M. J., Verdejo, A., Weinstock, R. S., Germine, L., & Chaytor, N. S. (2023). Glycemic Variability and Fluctuations in Cognitive Status in Adults With Type 1 Diabetes (GluCog): Observational Study Using Ecological Momentary Assessment of Cognition. JMIR diabetes, 8, e39750. https://doi.org/10.2196/39750

  13.  Chaytor, N, Trapani, V, Braffett, B, Fonseca, LM, Lorenzi, G, Gubitosi-Klug, R, Hitt, S, Farrell, K, Jacobson, A, & Ryan, C. (2023). Utility of the NIH Toolbox Cognition Battery in Middle to Older Aged Adults with Longstanding Type 1 Diabetes: The DCCT/EDIC Study. The Clinical Neuropsychologist. DOI: 10.1080/13854046.2023.2266876

  14.  Choe, J., Kudrna, R., Fonseca, L. M., & Chaytor, N. S. (2023). Usefulness of the Montreal Cognitive Assessment in Older Adults With Type 1 Diabetes. Diabetes spectrum: a publication of the American Diabetes Association, 36(4), 385–390. https://doi.org/10.2337/ds23-0012

  15.  Singh, S., Strong, R., Xu, I., Fonseca, L. M., Hawks, Z., Grinspoon, E., Jung, L., Li, F., Weinstock, R. S., Sliwinski, M. J., Chaytor, N. S., & Germine, L. T. (2023). Ecological Momentary Assessment of Cognition in Clinical and Community Samples: Reliability and Validity Study. Journal of medical Internet research, 25, e45028. https://doi.org/10.2196/45028

  16.  Mascarenhas Fonseca, L., Chaytor, N., Olufadi, Y., Buchwald, D., Galvin, J. E., Schmitter-Edgecombe, M., & Suchy-Dicey, A. (2023). Intraindividual Cognitive Variability and Magnetic Resonance Imaging in Aging American Indians: Data from the Strong Heart Study. Journal of Alzheimer’s disease: JAD, 91(4), 1395–1407. https://doi.org/10.3233/JAD-220825

  17.  Fonseca LM, Strong RW, Singh S, Bulger JD, Cleveland M, Grinspoon E, Janes K, Jung L, Miller K, Passell E, Ressler K, Sliwinski M, Verdejo A, Weinstock RS, Germine L, Chaytor NS (2023). Glycemic Variability and Fluctuations in Cognitive Status in Adults with Type 1 Diabetes (GluCog): An Observational Study using Ecological Momentary Assessment of Cognition. JIMR Diabetes, 8, DOI: 10.2196/39750 PMID: 36602848

  18.  Mascarenhas Fonseca L, Sheppard DP, Chaytor NS. MoCA Intraindividual Cognitive Variability in Older Adults With Type 1 Diabetes. Alzheimer Dis Assoc Disord. 2023;37(2):152-155. doi:10.1097/WAD.0000000000000534

  2022

  19.  Jett JD, Kordas G., Parent S, Keshtkar M, Shin R, King P, McPherson SM, Ries R, Roll JM, McDonell MG, Chaytor N. (2022). Assessing clinically significant cognitive impairment using the NIH Toolbox in individuals with co-occurring serious mental illness and alcohol use disorder. J Addict Med. PMID: 36346896. PMCID: Pending. DOI: 10.1097/ADM.0000000000001105

  20.  Yang PL, Chaytor NS, Burr RL, Kapur VK, McCurry SM, Vitiello MV, Hough CL, Parsons EC. (2022). Rest-Activity Rhythm Fragmentation and Weaker Circadian Strength Are Associated With Cognitive Impairment in Survivors of Acute Respiratory Failure. Biol Res Nurs.:10998004221109925. doi: 10.1177/10998004221109925. [Epub ahead of print] PubMed PMID: 35759356.

  21.  Sheppard DP, Rau HK, Werhane ML, Fonseca LM, Chaytor NS, Peskind ER, Pagulayan KF (2022). Associations between Intra-Individual Neurocognitive Variability and Prospective Memory in Veterans with Mild Traumatic Brain Injury History and Posttraumatic Stress Disorder. Arch Clin Neuropsychol., 37(6):1221-1227. doi: 10.1093/arclin/acac014. PubMed PMID: 35470369.

  22.  Miller, K. M., Kanapka, L. G., Rickels, M., Ahmann, A., Aleppo, G., Ang, L. P., Bhargava, A., Bode, B. W., Carlson, A. L., Chaytor, N., Gannon, G., Goland, R., Hirsh, I., Kiblinger, L., Kruger, D., Kudva, Y. C., Levy, C., McGill, J., O’Malley, G., Peters, A., … Pratley, R. (2022). Benefit of Continuous Glucose Monitoring (CGM) in Reducing Hypoglycemia is Sustained Through 12 Months of Use Among Older Adults with Type 1 Diabetes. Diabetes technology & therapeutics, 10.1089/dia.2021.0503. Advance online publication. https://doi.org/10.1089/dia.2021.0503 

  23.  Ashari, Z. E., Chaytor, N. S., Cook, D. J., & Ghasemzadeh, H. (2022). Memory-Aware Active Learning in Mobile Sensing Systems. IEEE transactions on mobile computing, 21(1), 1. https://doi.org/10.1109/tmc.2020.3003936

  2021

  24.  Singh, S., Strong, R. W., Jung, L., Li, F. H., Grinspoon, L., Scheuer, L. S., Passell, E. J., Martini, P., Chaytor, N., Soble, J. R., & Germine, L. (2021). The TestMyBrain Digital Neuropsychology Toolkit: Development and Psychometric Characteristics. Journal of clinical and experimental neuropsychology, 1–10. Advance online publication. https://doi.org/10.1080/13803395.2021.2002269

  25.  Jacobson, AM, Ryan, CM, Braffett, BH, Gubitosi-Klug, RA, Lorenzi, GM, Luchsinger, JA, Trapani, VR, Bebu, I, Chaytor, NS, Hitt, SM, Farrell, K, Lachin, JM, and the DCCT/EDIC Research Group (2021). Cognitive Performance Declines in Older Adults with Type 1 Diabetes: Results from 32 Years of Follow-up in the DCCT/EDIC Study. Lancet Diabetes & Endocrinology. Jul;9(7):436-445. doi: 10.1016/S2213-8587(21)00086-3. PMID: 34051936.

  26.  Fonseca, LM, Mattar, GP, Haddad, GG, Burduli, E, McPherson, SM, Ferreira Guilhoto, LMF, Filho, GB, Yassuda, MS, Bottino, CMC, Hoexter, MQ, Chaytor, NS (2021). Neuropsychiatric symptoms of Alzheimer’s disease in Down syndrome and its impact on caregiver distress. Journal of Alzheimer’s Disease, vol 81(1); 137-154. DOI: 10.3233/JAD-201009 

  27.  Chaytor NS, Barbosa-Leiker C, Germine LT, *Fonseca LM, McPherson SM, Tuttle KR (2021). Construct validity, ecological validity and acceptance of self-administered online neuropsychological assessment in adults. Clin Neuropsychol., 35(1), 148-164. doi:10.1080/13854046.2020.1811893, PMID: 32883156

  28.  Carlson, A. L., Kanapka, L. G., Miller, K. M., Ahmann, A. J., Chaytor, N. S., Fox, S., Kiblinger, L., Kruger, D., Levy, C. J., Peters, A. L., Rickels, M. R., Salam, M., Shah, V. N., Young, L. A., Kudva, Y. C., Pratley, R., & WISDM Study Group (2021). Hypoglycemia and Glycemic Control in Older Adults With Type 1 Diabetes: Baseline Results From the WISDM Study. Journal of diabetes science and technology, 15(3), 582–592. https://doi.org/10.1177/1932296819894974

  2020

  29.  Pratley RE, Kanapka LG, Rickels MR, Ahmann A, Aleppo G, Beck R, Bhargava A, Bode BW, Carlson A, Chaytor NS, Fox DS, Goland R, Hirsch IB, Kruger D, Kudva YC, Levy C, McGill JB, Peters A, Philipson L, Philis-Tsimikas A, Pop-Busui R, Shah VN, Thompson M, Vendrame F, Verdejo A, Weinstock RS, Young L, Miller KM. (2020). Effect of Continuous Glucose Monitoring on Hypoglycemia in Older Adults With Type 1 Diabetes: A Randomized Clinical Trial. JAMA. Jun 16;323(23):2397-2406.  PubMed PMID: 32543682; PubMed Central PMCID: PMC7298607.

For the MD program, Dr. Chaytor serves in the following roles; small group advisor and component contributer for  MEDSCHLR; Nervous System and Behavioral Health component contributor. She also supervises medical student research projects and Clinical Psychology graduate students.