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Geo Kartheiser, Ph.D.

KartheiserGeo Kartheiser is a postdoctoral fellow under the mentorship of Dr. Matthew Dye, Ph.D. in the DeafxLab at Rochester Institute of Technology. He received his BS in Advertising and Public Relations at RIT. In his first post-baccalaureate job, he worked as a Research Coordinator for Dr. Dye in Crossmodal Plasticity Laboratory at University of Illinois at Urbana-Champaign. After his 2 and half year stint in Urbana-Champaign, he moved to Washington, D.C. where he earned his Ph.D. in Educational Neuroscience at Gallaudet University (Dr. Laura-Ann Petitto, Advisor). Spatial working memory, bilingualism, signed language, cochlear implant, and neuroplasticity are some of his research interests.


Gallaudet University

Educational Neuroscience (Ph.D.)


Rochester Institute of Technology

Advertising and Public Relations (B.S.)



His Ph.D. work focused on whether experience with sign language, a visual-spatial language, improves your ability to perform other things spatially-related. He is currently running--with Dr. Dye’s (PI) guidance--a large scale research study of neuroplasticity as a result of cochlear implant and sign language in deaf and hard-of-hearing college students. True to his background as an Educational Neuroscientist, he aims to make his findings accessible to parents, medical professionals, and policymakers so that they may make research informed decisions.

Selected Publications

Scassellatti, B., Brawer, J., Tsui, K., Nasihati Gilani, S., Malzkuhn, M., Manini, B., Stone, A., Kartheiser, G., Merla, A., Shapiro, A., Traum, D., & Petitto, L.A. (2018). Teaching Language to Deaf Infants with a Robot and a Virtual Human. In Proceedings of the 2018 CHI Conference on Human Factors in Computing Systems (pp.553; 1-553:13). New York, NY, USA: ACM.

Petitto, L.A., Langdon, C., Stone, A., Andriola, D., Kartheiser, G., & Cochran, C. (2016). Visual sign phonology: Insights into human reading from a natural soundless phonology. WIREs Cognitive Science. doi: 10.1002/journal.wcs.1404

Stone, A., Kartheiser, G., Hauser, P.C., Petitto, L.A., & Allen, T.E. (2015). Fingerspelling as a novel gateway into reading fluency in deaf bilinguals. PLoS ONE, 10(10), e0139610. doi: 10.1371/journal.pone.0139610

Kartheiser, G. & Williams, F. (2015). Integrating Diversity with Quantitative, Qualitative, and Mixed Methods. In R. Harris & F. Williams (Eds.), Research and Evaluation in Education and Psychology, ASL Version. Austin, TX: ASLChoice.

Recent Conference Presentations

Kartheiser, G. (2019, September). Author Recognition is a Significant Predictor of Reading Fluency in Deaf College-Aged Students. Poster, 13th Theoretical Issues in Sign Language Research (TISLR), Hamburg, Germany.

Kartheiser, G., Sharma, A., Bell-Souder, D., & Dye, M. (2018, October). Preliminary Assessment of Cognitive Fluidity in Deaf College Students from Diverse Linguistic Backgrounds. Poster, Workshop on Reading, Language, and Deafness, San Sebastian, Spain.

Kartheiser, G. & Petitto, L.A. (2017, November). The impact of age of language exposure on spatial working memory using fNIRS neuroimaging. Poster, Society for Neuroscience, Washington, D.C.

Stone, A., Manini, B., Kartheiser, G., Malzkuhn, M., Langdon, C., Merla, A., & Petitto, L.A. (2017, April). Detecting the rhythmic temporal patterning of language: Infants’ neural, physiological, and behavioral sensitivity. In L.A. Petitto (Chair), Discoveries about infant language learning and “readiness to learn” from integrated fNIRS, thermal IR, robot, and avatar sciences. Symposium conducted at Society for Research on Child Development, Austin, TX.