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4th year PhD Student in the Department of Computer and Information Science and Institute for Research in Cognitive Science at the University of Pennsylvania Office: IRCS 424 |
Language, cognition, and computation are fundamentally linked. I study the structure of language in the mind by exploring the intersection of linguistic theory, language acquisition and processing, and computational modeling. I work primarily with Mitch Marcus and Charles Yang.
I am also interested in language-based interaction between humans and autonomous systems. I have previously worked on speech user interfaces at Microsoft and now work on how natural language can be used to control autonomous robots. I'm part of the Penn SUBTLE MURI project, working with groups from UMass Lowell and Amherst, George Mason University, Cornell, and Army Research Labs.
Upcoming Talks/Posters
Constantine Lignos. A cognitive approach to infant word segmentation. Yale Linguistics Seminar. February 10th, 2012.
Laurel MacKenzie and Constantine Lignos. Size matters: the effect of subject length on contraction. Presentation at Georgetown University Round Table on Languages and Linguistics. March 8-11, 2012.
Constantine Lignos and Kyle Gorman. The subtleties of frequency in morphological processing. Poster at CUNY Conference on Human Sentence Processing. March 14-16, 2012.
Constantine Lignos. You can't get there from here: On interpreting learning experiments. Presentation at Penn Linguistics Colloquium. March 23-25, 2012.
Constantine Lignos and Charles Yang. Infant Word Segmentation: An Incremental, Integrated Model. Presentation at West Coast Conference on Formal Linguistics. April 13-15, 2012.
Articles
Erwin Chan and Constantine Lignos. Investigating the relationship between linguistic representation and computation through an unsupervised model of human morphology learning. Research on Language and Computation, 8:0 209-238, 2010. [ paper ]
Constantine Lignos, Erwin Chan, Mitchell Marcus, and Charles Yang. A rule-based acquisition model adapted for morphological analysis. In C. Peters, G. Di Nunzio, M. Kurimo, T. Mandl, D. Mostefa, A. Penas, and G. Roda, editors, Multilingual Information Access Evaluation I. Text Retrieval Experiments, volume 6241 of Lecture Notes in Computer Science, pages 658-665. Springer Berlin / Heidelberg, 2010. [ preprint ]
Conference/Workshop Proceedings
Constantine Lignos. Modeling infant word segmentation. In Proceedings of the Fifteenth Conference on Computational Natural Language Learning, pages 29-38, Portland, Oregon, USA, June 2011. Association for Computational Linguistics. [ paper ]
Constantine Lignos. Learning from Unseen Data. In Mikko Kurimo, Sami Virpioja, and Ville T. Turunen, editors, Proceedings of the Morpho Challenge 2010 Workshop, pages 35-38, Helsinki, Finland, September 2-3 2010. Aalto University School of Science and Technology. [ paper ]
Constantine Lignos and Charles Yang. Recession segmentation: Simpler online word segmentation using limited resources. In Proceedings of the Fourteenth Conference on Computational Natural Language Learning, pages 88-97, Uppsala, Sweden, July 2010. Association for Computational Linguistics. [ paper ]
Constantine Lignos, Erwin Chan, Charles Yang, and Mitchell P. Marcus. Evidence for a morphological acquisition model from development data. In Katie Franich, Kate M. Iserman, and Lauren L. Keil, editors, Proceedings of the 34th Annual Boston University Conference on Language Development. Cascadilla Press, 2010. [ paper ]
Constantine Lignos, Erwin Chan, Mitchell P. Marcus, and Charles Yang. A Rule-Based Unsupervised Morphology Learning Framework. In Working Notes of the 10th Workshop of the Cross-Language Evaluation Forum, CLEF 2009, Corfu, Greece, September 30-October 2 2009. [ paper ]
Emily Wang, Constantine Lignos, Ashish Vatsal, and Brian Scassellati. Effects of head movement on perceptions of humanoid robot behavior. In HRI '06: Proceedings of the 1st ACM SIGCHI/SIGART Conference on Human-Robot Interaction, pages 180-185, New York, NY, USA, 2006. ACM. [ paper ]
Conference Presentations
Constantine Lignos. The journey to word segmentation. Presentation at BUCLD 36, November 4-6 [ slides ]
Constantine Lignos and Charles Yang. Using prosody to bootstrap word segmentation in a more realistic learning environment. Presentation at BCCCD in the sympsosium "The Role Of Prosody In Guiding Language Learning In Pre-Lexical Infants" organized by Mohinish Shukla, January 14-16 2011. [ slides ]
Constantine Lignos and Jana Beck. The power of objects in morphology learning. Presentation at LSA Annual Meeting, January 6-9 2011. [ slides ]