Gary S. Dell
Primary AffiliationIllinois Language and Literacy Initiative
Gary Dell received his Ph.D. from the University of Toronto in 1980. He is a professor in the U of I Department of Psychology and a full-time faculty member in the Beckman Institute Cognitive Science group. His fields of professional interest are psycholinguistics, cognitive science, and connectionist models.
National Academy of Sciences, 2015
American Academy of Arts and Sciences, 2015
American Psychological Association Early Career Award for Distinguished Scientific Contribution to Psychology (1987).
Gary Dell's work in the Beckman Institute deals with how people produce and understand sentences, and how these processes can be modelled using neural networks. For example, his research on language production attempts to understand production errors or "slips of the tongue." He has developed a neural net model that makes predictions about the qualitative and quantitative properties of speech errors. These predictions are tested using experimental procedures in which subjects produce words and sentences under controlled conditions. A particularly interesting aspect of the model is that it can be used to understand patterns of behavior resulting from brain damage. By changing the processing characteristics of the model, one can produce speech error patterns that are characteristic of certain types of aphasic patients.
The study of language and the use of neural networks are both central research areas in the Beckman Institute, particularly the Institute's efforts in Biological Intelligence. Dell collaborates with students and faculty from the fields of linguistics and computer science.
Dell's sources of research support include the NSF and NIH.
- Jacobs, C. L.; Dell, G. S.; Benjamin, A. S.; Bannard, C., Part and Whole Linguistic Experience Affect Recognition Memory for Multiword Sequences. Journal of Memory and Language 2016, 87, 38-58.
- Kittredge, A. K.; Dell, G. S., Learning to Speak by Listening: Transfer of Phonotactics from Perception to Production. Journal of Memory and Language 2016, 89, 8-22.
- Jacobs, C. L.; Yiu, L. K.; Watson, D. G.; Dell, G. S., Why Are Repeated Words Produced with Reduced Durations? Evidence from Inner Speech and Homophone Production. Journal of Memory and Language 2015, 84, 37-48.
- Kimball, A.; Cole1, J.; Dell1, G., Categorical vs. Episodic Memory for Pitch Accents in English, Proceedings of the International Congress on Phonetic Sciences, Glasgow, Scotland, 2015.
- Nozari, N.; Dell, G. S.; Schneck, K.; Gordon, B. Implementation of Selective Attention in Sequential Word Production, The 37th Annual Conference of the Cognitive Science Society, July 22-25, 2015.
- Warker, J. A.; Dell, G. S., New Phonotactic Constraints Learned Implicitly by Producing Syllable Strings Generalize to the Production of New Syllables. Journal of Experimental Psychology-Learning Memory and Cognition 2015, 41, (6), 1902-1910.
- Dell, G. S., Phonemes and Production. Language Cognition and Neuroscience 2014, 29, (1), 30-32, DOI:10.1080/01690965.2013.851795.
- Dell, G. S.; Chang, F., The P-Chain: Relating Sentence Production and Its Disorders to Comprehension and Acquisition. Philosophical Transactions of the Royal Society B-Biological Sciences 2014, 369, (1634), DOI:ARTN 20120394 DOI:10.1098/Rstb.2012.0394.
- Jacobs, C. L.; Dell, G. S., ‘Hotdog’, Not ‘Hot’ ‘Dog’: The Phonological Planning of Compound Words. Language Cognition and Neuroscience 2014, 29, (4), 512-523, DOI:10.1080/23273798.2014.892144.
- Nozari, N.; Dell, G. S., Feature Migration in Time: Reflection of Selective Attention on Speech Errors. Journal of Experimental Psychology: Learning, Memory, and Cognition 2012, 38, 1084-1090.
- Cholin, J.; Dell, G. S.; Levelt, W. J. M., Planning and Articulation in Incremental Word Production: Syllable-Frequency Effects in English. Journal of Experimental Psychology-Learning Memory and Cognition 2011, 37, (1), 109-122.
- Dell, G. S.; Schwartz, M. F., Who’s in and Who’s Out? Inclusion Criteria, Model Evaluation, and the Treatment of Exceptions in Case Series. Cognitive Neuropsychology 2011, 7, 515-520.
- Dell, G.; Kittredge, A., Connectionist Models of Aphasia and Other Language Impairments, In Handbook of Psycholinguistic and Cognitive Processes: Perspectives in Communication Disorders; Guendouzi, J., Loncke, F., Williams, M. J., Eds. 2011, 169-188.
- Hailpern, J.; Danilevsky, M.; Harris, A.; K., K.; Dell, G. S.; Hengst, J. ACES: Promoting empathy towards aphasia through language distortion emulation software., The Proceedings of CHI 2011, Vancouver, B.C., 2011.
- Kittredge, A. K.; Dell, G. S., Implicit Learning of Phonotactic Constraints: Transfer from Perception to Production. Proceedings of the 33nd Annual Conference of the Cognitive Science Society 2011.
- Nozari, N.; Dell, G. S.; Schwartz, M. F., Is comprehension necessary for error detection? A conflict-based account of monitoring in speech production. Cognitive Psychology 2011, 63, 1-33.
- Schwartz, M. F.; Kimberg, D. Y.; Walker, G. M.; Brecher, A.; Faseyitan, O. K.; Dell, G. S.; Mirman, D.; Coslett, H. B., Neuroanatomical dissociation for taxonomic and thematic knowledge in the human brain. Proceedings of the National Academy of Sciences of the United States of America 2011, 108, (20), 8520-8524.
- Walker, G. M.; Schwartz, M. F.; Kimberg, D. Y.; Faseyitan, O.; Brecher, A.; Dell, G. S.; Coslett, H. B., Support for anterior temporal involvement in semantic error production in aphasia: New evidence from VLSM. Brain and Language 2011, 117, (3), 110-122.
- Oppenheim, G. M.; Dell, G. S.; Schwartz, M. F., The dark side of incremental learning: A model of cumulative semantic interference during lexical access in speech production. Cognition 2010, 114, (2), 227-252.
- Becic, E.; Dell, G. S.; Bock, K.; Garnsey, S. M.; Kubose, T.; Kramer, A. F., Driving impairs talking. Psychonomic Bulletin & Review 2010, 17, 15-21.
- Dell, G. S., Language production and comprehension. . In Cognitive Neuroscience: The Biomedical & Life Sciences Collection, McClelland, J.; Lambon Ralph, M. A., Eds. Henry Stewart Talks, Ltd.: London, 2010.
- Dell, G. S.; Kittredge, A. K., Connectionist models of aphasia and other language impairments. In Handbook of psycholinguistic & cognitive processes: Perspectives in communication disorders, Guendouzi, J.; Loncke, F.; Williams, M., Eds. Taylor and Francis: 2010.
- Mirman, D.; Kittredge, A. K.; Dell, G. S., Effects of near and distant phonological neighbors on picture naming., Proceedings of 32nd Annual Conference of the Cognitive Science Society, Portland, OR, 2010; pp 1447-1452.
- Oppenheim, G. M.; Dell, G. S., Motor movement matters: The flexible abstractness of inner speech. Memory & Cognition 2010, 38, (8), 1147-1160.
- Abel, S.; Huber, W.; Dell, G. S., Connectionist diagnosis of lexical disorders in aphasia. Aphasiology 2009, 23, (11), 1-26.
- Schwartz, M. F.; Kimberg, D. Y.; Walker, G. M.; Faseyitan, O.; Brecher, A.; Dell, G. S.; Coslett, H. B., Anterior temporal involvement in semantic word retrieval: voxel-based lesion-symptom mapping evidence from aphasia. Brain 2009, 132, 3411-3427.
- Warker, J. A.; Xu, Y.; Dell, G. S.; Fisher, C., Speech errors reflect the phonotactic constraints in recently spoken syllables, but not in recently heard syllables. Cognition 2009, 112, (1), 81-96.
- Hsiao, E. Y.; Schwartz, M. F.; Schnur, T. T.; Dell, G. S., Temporal characteristics of semantic perseverations induced by blocked-cyclic picture naming. Brain and Language 2009, 108, (3), 133-144.
- Nozari, N.; Dell, G. S., More on lexical bias: How efficient can a "lexical editor" be? Journal of Memory and Language 2009, 60, (2), 291-307.
- Baron, R.; Hanley, J. R.; Dell, G. S.; Kay, J., Testing single- and dual-route computational models of auditory repetition with new data from six aphasic patients. Aphasiology 2008, 22, (1), 62-76.
- Dell, G. S.; Caramazza, A., Introduction to special issue on computational modelling in cognitive neuropsychology. Cognitive Neuropsychology 2008, 25, (2), 131-135.
- Dell, G. S.; Oppenheim, G. M.; Kittredge, A. K., Saying the right word at the right time: Syntagmatic and paradigmatic interference in sentence production. Language and Cognitive Processes 2008, 23, (4), 583-608.
- Kittredge, A. K.; Dell, G. S.; Verkuilen, J.; Schwartz, M. F., Where is the effect of frequency in word production? Insights from aphasic picture-naming errors. Cognitive Neuropsychology 2008, 25, (4), 463-492.
- Oppenheim, G. M.; Dell, G. S., Inner speech slips exhibit lexical bias, but not the phonemic similarity effect. Cognition 2008, 106, (1), 528-537.
- Warker, J. A.; Dell, G. S.; Whalen, C. A.; Gereg, S., Limits on learning phonotactic constraints from recent production experience. Journal of Experimental Psychology-Learning Memory and Cognition 2008, 34, (5), 1289-1295.
- Bock, J. K.; Dell, G. S.; Garnsey, S. M.; Kramer, A. F.; Kubose, T., Car talk, car listen In Automaticity and control in language processing Meyer, A. S.; Wheeldon, L. R.; Krott, A., Eds. Psychology Press: Hove, England, 2007; pp 21-42.
- Bock, K.; Dell, G. S.; Chang, F.; Onishi, K. H., Persistent structural priming from language comprehension to language production. Cognition 2007, 104, (3), 437-458.
- Dell, G. S.; Martin, N.; Schwartz, M. F. A case-series test of the interactive two-step model of lexical access: Predicting word repetition from picture naming. Journal of Memory and Language 2007, 56, (4), 490-520.
- Dell, G. S.; Warker, J. A. Using slips to study phonotactic learning in the laboratory. MIT Working Papers in Linguistics 2007, 53, 75-93.
- Kittredge, A. K.; Dell, G. S.; Schwartz, M. F., Omissions in aphasic picture naming: Late age-of-acquisition is the culprit, not low semantic density. Brain and Language 2007, 103, (1-2), 132-133.
- Oppenheim, G. M.; Dell, G. S.; Schwartz, M. F., Cumulative semantic interference as learning. Brain and Language 2007, 103, (1-2), 175-176.
- Tse, C. Y.; Lee, C. L.; Sullivan, J.; Garnsey, S. M.; Dell, G. S.; Fabiani, M.; Gratton, G., Imaging cortical dynamics of language processing with the event-related optical signal. Proceedings of the National Academy of Sciences of the United States of America 2007, 104, (43), 17157-17162.
- Kittredge, A. K.; Dell, G. S.; Schwartz, M. F. Aphasic picture-naming errors reveal the influence of lexical variables on production stages. Brain and Language 2006, 99, (1-2), 216-217.
- Tse, C. Y.; Lee, C. L.; Sullivan, J.; Agrawal, A.; Zarif, M.; Garnsey, S.; Dell, G. S.; Fabiani, M.; Gratton, G. An event-related optical signal (EROS) study of frontal and temporal cortices in processing semantic and syntactic anomaly during sentence comprehension. Psychophysiology 2006, 43, S99-S99.
- Whalen, C. A.; Dell, G. S. Speaking outside the box: Learning of non-native phonotactic constraints is revealed in speech errors. Proceedings of the 28th Annual Conference of the Cognitive Science Society 2006.