Charalambos (Haris) Themistocleous is a linguist with research interests in speech, language, and communication. He has developed machine learning models for automatic treatment, monitoring, and differential diagnosis of patients with Primary Progressive Aphasia (PPA), Alzheimer's disease, and Mild Cognitive Impairment from speech, language, structural/functional MRI, and neurophysiological testing. His Ph.D. research focused on the information structure & prosody interface and the sociolinguistic effects on speech. His work has been published in more than twenty journal publications, including the Journal of Alzheimer's Disease, Brain Sciences, Journal of Speech, Language, and Hearing Research, and Frontiers in Neurology.
CV, Google Scholar, Github ResearchGate, Personal Website
Employment
- Associate Professor of Speech, Language, and Communication, Department of Special Needs Education, University of Oslo, 2022
- Postdoctoral Fellow in Computational Neurolinguistics, Department of Neurology and NeurosurgeryJohns Hopkins University, 2018
- Postdoctoral Fellow in Computational Linguistics, Centre for Linguistic Theory and Studies in Probability (CLASP); Researcher at Språkbanken, Department of Swedish, University of Gothenburg, 2016
- Visiting research scholar, Seeger Center for Hellenic Studies, Princeton University, 2015
Education
- PhD in Linguistics, University of Athens, Athens, Greece
- MSc in Computational Linguistics, University of Skövde, Skövde, Sweden.
- MA in Applied Linguistics, University of Athens, Athens Greece
- BA in Classics/Linguistics, University of Athens, Athens, Greece
Professional Affiliations
Academic Service
Associate Editor
Journal of Alzheimer's Disease (JAD) (2021 - 2022)
Reviewer (Recent)
Cortex, Clinical Linguistics & Phonetics, Aphasiology, PLOS One, PLOS Digital Health, Brain Sciences, Alzheimer’s and Dementia, J. of Alzheimer’s Disease, J. of the International Neuropsychological Society, Natural Language Engineering, Frontiers in Psychology, Computer Speech and Language, Human Brain Mapping, Brain and Language, Frontiers in Communication, Biolinguistics, Frontiers in Neurology, Speech Communication, Phonetica, Lingua, J. of Logic and Computation, J. of the International Phonetic Association (JIPA), J. of the Acoustical Society of America.
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Themistocleous, Charalambos, Fyndanis, Valantis, & Tsapkini, Kyrana. (2022). Sonorant spectra and coarticulation distinguish speakers with different dialects. Speech Communication.https://doi.org/10.1016/j.specom.2022.06.002.
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Afthinos Afthinos, Themistocleous Charalambos,Herrmann Olivia, Fan Hongli, Lu Hanzhang, Tsapkini, Kyrana (2022). The Contribution of Working Memory Areas to Verbal Learning and Recall in Primary Progressive Aphasia. Frontiers in Neurology, 13. https://doi.org/10.3389/fneur.2022.698200.
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Stark Brielle C., Bryant Lucy, Themistocleous Charalambos, den Ouden Dirk-Bart, Roberts Angela C. (2022). Best practice guidelines for reporting spoken discourse in aphasia and neurogenic communication disorders. Aphasiology, 1-24. https://doi.org/10.1080/02687038.2022.2039372.
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Themistocleous Charalambos, Webster Kimberly, Tsapkini, Kyrana (2021). Effects of tDCS on Sound Duration in Patients with Apraxia of Speech in Primary Progressive Aphasia. Themistocleous Charalambos, Webster Kimberly, Tsapkini, Kyrana (2021). Effects of tDCS on Sound Duration in Patients with Apraxia of Speech in Primary Progressive Aphasia. Brain Sciences, 11(3). https://doi.org/10.3390/brainsci11030335.
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Themistocleous Charalambos, Bronte Ficek, Kimberly Webster, Dirk-Bart den Ouden, Argye E. Hillis, Kyrana Tsapkini (2021). Automatic subtyping of individuals with Primary Progressive Aphasia. Journal of Alzheimer’s Disease. https://doi.org/10.3233/JAD-201101.
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Themistocleous Charalambos, Kyriaci Neophytou, Brenda Rapp, Tsapkini Kyrana (2020). Au- tomatic metrics of spelling errors on words and non-words. Journal of Speech, Language, and Hearing Research. https://doi.org/10.1044/2020_JSLHR-20-00177.
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Themistocleous Charalambos, Webster Kimberly, Alexandros Afthinos, and Tsapkini Kyrana (2020). Morphological markers in speech production distinguish individuals with different primary progressive aphasia variants: A natural language processing and machine learning approach. American Journal of Speech-Language Pathology. https://pubs.asha.org/doi/10.1044/2020_AJSLP-19-00114.
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Themistocleous, Charalambos, Eckerström Marie, Kokkinakis Dimitrios (2020). Voice quality and speech fluency distinguish individuals with Mild Cognitive Impairment from Healthy Controls. PLOS ONE 5(7): e0236009. https://doi.org/10.1371/journal.pone.0236009.
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Stark Brielle C., Dutta Manaswita, Murray Laura, Bryant Lucy, Fromm Davida; MacWhinney Brian, Ramage Amy, Simmons-Mackie Nina, Roberts Angela, Fergadiotis Gerasimos, den Ouden Dirk, Brock Kris, McKinney-Bock Katy, Jin Paek Eun, Harmon Tyson, Themistocleous Charalambos, Yoo Hyunsoo, On Yoon Si, Sharma Saryu, Aveni Katharine, Gutierrez Stephanie, Doppelbauer Lea, Dawn Bunker Lisa (2020). Standardizing assessment of spoken discourse in aphasia: A working group with deliverables. American Journal of Speech-Language Pathology. 1–12.
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Georgiou George and Themistocleous Charalambos (2020). Vowel learning in diglossic settings: Evidence from Arabic-Greek learners. International Journal of Bilingualism. https://doi.org/10.1177/1367006920945396.
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Themistocleous Charalambos (2019). Dialect classification from a single sonorant sound using Deep Neural Networks. Frontiers in Communication. https://doi.org/10.3389/fcomm.2019.00064.
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Fyndanis Valantis and Themistocleous Charalambos (2019). Are there prototypical associations between time frames and aspectual values? Evidence from Greek aphasia and healthy ageing, Clinical Linguistics and Phonetics.
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Themistocleous Charalambos, Eckerström Marie, and Dimitrios Kokkinakis (2018). Identification of Mild Cognitive Impairment from Speech in Swedish using Deep Sequential Neural Networks. Frontiers in Neurology 9, 975. URL: https://www.frontiersin.org/article/10.3389/fneur.2018.00975.
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Themistocleous, Charalambos (2017). Effects of two linguistically proximal varieties on the spectral and coarticulatory properties of fricatives: Evidence from Athenian Greek and Cypriot Greek. Frontiers in Psychology.
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Themistocleous, Charalambos (2017). Dialect classification using vowel acoustic parameters. Speech Communication 94, 13 – 22.
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Grohmann Kleanthes, Papadopoulou Elena and Themistocleous Charalambos (2017). Acquiring Clitic Placement in Bilectal Settings: Interactions between Social Factors. Frontiers in Communication 2:5.
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Themistocleous, Charalambos (2017). The Nature of Phonetic Gradience across a Dialect Continuum: Evidence from Modern Greek Vowels. Phonetica 74, 157–172.
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Themistocleous, Charalambos (2016). Seeking an anchorage: Evidence from the tonal alignment of the Cypriot Greek prenuclear pitch accent. Language and Speech, 59(4):433–461.
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Themistocleous, Charalambos (2016). The bursts of stops can convey dialectal information. Journal of the Acoustical Society of America EL 140(4), EL334–EL340.
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Themistocleous, Charalambos (2014). Edge-Tone Effects and Prosodic Domain Effects on Final Lengthening. Linguistic Variation 14(1). 129–160.
