Journal Papers and Book Chapters

Kallirroi Georgila. Speech Synthesis: State-of-the-art and Challenges for the Future. Book chapter in the book Social Signal Processing (edited by Judee K. Burgoon, Nadia Magnenat-Thalmann, Maja Pantic, and Alessandro Vinciarelli), Cambridge University Press, 2017 (this chapter was written in 2013).

Elnaz Nouri, Kallirroi Georgila, and David Traum. Culture-Specific Models of Negotiation for Virtual Characters: Multi-Attribute Decision-Making Based on Culture-Specific Values. AI & Society, Special Issue on Culturally Motivated Virtual Characters, 32(1):51-63, Springer, 2017 (first published online in 2014).

Takuya Hiraoka, Kallirroi Georgila, Elnaz Nouri, David Traum, and Satoshi Nakamura. Reinforcement Learning of Multi-Party Trading Dialog Policies. Transactions of the Japanese Society for Artificial Intelligence, Vol. 31, No. 4, 2016.

Kallirroi Georgila, Maria Wolters, Johanna D. Moore, and Robert H. Logie. The MATCH Corpus: A Corpus of Older and Younger Users' Interactions with Spoken Dialogue Systems. Language Resources and Evaluation, 44(3):221-261, Springer, 2010.

Kallirroi Georgila, Oliver Lemon, James Henderson, and Johanna D. Moore. Automatic Annotation of Context and Speech Acts for Dialogue Corpora. Journal of Natural Language Engineering, 15(3):315-353, Cambridge University Press, 2009.

Maria Wolters, Kallirroi Georgila, Johanna D. Moore, and Sarah E. MacPherson. Being Old Doesn't Mean Acting Old: How Older Users Interact with Spoken Dialog Systems. ACM Transactions on Accessible Computing (TACCESS), Volume 2, Issue 1, Article No. 2, May 2009.

Maria Wolters, Kallirroi Georgila, Johanna D. Moore, Robert H. Logie, Sarah E. MacPherson, and Matthew Watson. Reducing Working Memory Load in Spoken Dialogues: Do We Have to Limit the Number of Options? Interacting with Computers, 21(4):276-287, Elsevier, 2009.

James Henderson, Oliver Lemon, and Kallirroi Georgila. Hybrid Reinforcement/Supervised Learning of Dialogue Policies from Fixed Datasets. Computational Linguistics, 34(4):487-511, MIT Press, 2008.

Kallirroi Georgila, Kyriakos Sgarbas, Anastasios Tsopanoglou, Nikos Fakotakis, and George Kokkinakis. A Speech-Based Human-Computer Interaction System for Automating Directory Assistance Services. International Journal of Speech Technology, Special Issue on Speech and Human Computer Interaction, Vol. 6, No. 2, pp. 145-159, Kluwer Academic Publishers, April 2003.

Kallirroi Georgila, Nikos Fakotakis, and George Kokkinakis. Large Vocabulary Search Space Reduction Employing Directed Acyclic Word Graphs and Phonological Rules. International Journal of Speech Technology, Vol. 5, No. 4, pp. 355-370, Kluwer Academic Publishers, November 2002.

Kallirroi Georgila, Nikos Fakotakis, and George Kokkinakis. Stochastic Language Modelling for Recognition and Generation in Dialogue Systems. TAL (Traitement automatique des langues) journal, Vol. 43(3), pp. 129-154, 2002.


Conference and Workshop Papers

Ramesh Manuvinakurike, David DeVault, and Kallirroi Georgila. Using Reinforcement Learning to Model Incrementality in a Fast-Paced Dialogue Game. In Proceedings of the 18th Annual SIGdial Meeting on Discourse and Dialogue, Saarbrücken, Germany, 2017. (to appear)

Benjamin Nye, Shamya Karumbaiah, S. Tugba Tokel, Mark G. Core, Giota Stratou, Daniel Auerbach, and Kallirroi Georgila. Analyzing Learner Affect in a Scenario-Based Intelligent Tutoring System. In Proceedings of the International Conference on Artificial Intelligence in Education (AIED), Wuhan, China. Lecture Notes in Computer Science, Vol. 10331, pp. 544-547, Springer International Publishing AG, 2017.

Mark G. Core, Kallirroi Georgila, Benjamin D. Nye, Daniel Auerbach, Zhi Fei Liu, and Richard DiNinni. Learning, Adaptive Support, Student Traits, and Engagement in Scenario-Based Learning. In Proceedings of the Interservice/Industry Training, Simulation and Education Conference (I/ITSEC), Orlando, Florida, USA, 2016. ****honorable mention****

Ron Artstein, Alesia Gainer, Kallirroi Georgila, Anton Leuski, Ari Shapiro, and David Traum. New Dimensions in Testimony Demonstration. In Proceedings of the North American Chapter of the Association for Computational Linguistics - Human Language Technologies (NAACL-HLT), Demonstrations, pp. 32-36, San Diego, California, USA, 2016.

Kallirroi Georgila and David V. Pynadath. Towards a Computational Model of Human Opinion Dynamics in Response to Real-World Events. In Proceedings of the 29th International FLAIRS Conference, pp. 44-49, Key Largo, Florida, USA, 2016.

David Traum, Andrew Jones, Kia Hays, Heather Maio, Oleg Alexander, Ron Artstein, Paul Debevec, Alesia Gainer, Kallirroi Georgila, Kathleen Haase, Karen Jungblut, Anton Leuski, Stephen Smith, and William Swartout. New Dimensions in Testimony: Digitally Preserving a Holocaust Survivor's Interactive Storytelling. In Proceedings of the 8th International Conference on Interactive Digital Storytelling (ICIDS), Copenhagen, Denmark. Lecture Notes in Computer Science, Vol. 9445, pp. 269-281, Springer International Publishing Switzerland, 2015. ****best paper award****

Giota Stratou, Louis-Philippe Morency, David DeVault, Arno Hartholt, Edward Fast, Margaux Lhommet, Gale Lucas, Fabrizio Morbini, Kallirroi Georgila, Stefan Scherer, Jonathan Gratch, Stacy Marsella, David Traum, and Albert Rizzo. A Demonstration of the Perception System in SimSensei, a Virtual Human Application for Healthcare Interviews. In Proceedings of the 6th International Conference on Affective Computing and Intelligent Interaction (ACII), Xi'an, China, 2015. ****best demo paper award****

David Traum, Kallirroi Georgila, Ron Artstein, and Anton Leuski. Evaluating Spoken Dialogue Processing for Time-Offset Interaction. In Proceedings of the 16th Annual SIGdial Meeting on Discourse and Dialogue, pp. 199-208, Prague, Czech Republic, 2015. ****best paper award****

Takuya Hiraoka, Kallirroi Georgila, Elnaz Nouri, David Traum, and Satoshi Nakamura. Reinforcement Learning in Multi-Party Trading Dialog. In Proceedings of the 16th Annual SIGdial Meeting on Discourse and Dialogue, pp. 32-41, Prague, Czech Republic, 2015.

Alexandros Papangelis and Kallirroi Georgila. Reinforcement Learning of Multi-Issue Negotiation Dialogue Policies. In Proceedings of the 16th Annual SIGdial Meeting on Discourse and Dialogue, pp. 154-158, Prague, Czech Republic, 2015.

Eli Pincus, Kallirroi Georgila, and David Traum. Which Synthetic Voice Should I Choose for an Evocative Task? In Proceedings of the 16th Annual SIGdial Meeting on Discourse and Dialogue, pp. 105-113, Prague, Czech Republic, 2015.

Louis-Philippe Morency, Giota Stratou, David DeVault, Arno Hartholt, Margaux Lhommet, Gale Lucas, Fabrizio Morbini, Kallirroi Georgila, Stefan Scherer, Jonathan Gratch, Stacy Marsella, David Traum, and Albert Rizzo. SimSensei Demonstration: A Perceptive Virtual Human Interviewer for Healthcare Applications. In Proceedings of the 29th AAAI Conference on Artificial Intelligence (AAAI), Demonstrations, Austin, Texas, USA, 2015.

Kallirroi Georgila, Claire Nelson, and David Traum. Single-Agent vs. Multi-Agent Techniques for Concurrent Reinforcement Learning of Negotiation Dialogue Policies. In Proceedings of the 52nd Annual Meeting of the Association for Computational Linguistics (ACL), pp. 500-510, Baltimore, Maryland, USA, 2014.

Fabrizio Morbini, David DeVault, Kallirroi Georgila, Ron Artstein, David Traum, and Louis-Philippe Morency. A Demonstration of Dialogue Processing in SimSensei Kiosk. In Proceedings of the 15th Annual SIGdial Meeting on Discourse and Dialogue, pp. 254-256, Philadelphia, Pennsylvania, USA, 2014.

David DeVault, Ron Artstein, Grace Benn, Teresa Dey, Ed Fast, Alesia Gainer, Kallirroi Georgila, Jon Gratch, Arno Hartholt, Margaux Lhommet, Gale Lucas, Stacy Marsella, Fabrizio Morbini, Angela Nazarian, Stefan Scherer, Giota Stratou, Apar Suri, David Traum, Rachel Wood, Yuyu Xu, Albert Rizzo, and Louis-Philippe Morency. SimSensei Kiosk: A Virtual Human Interviewer for Healthcare Decision Support. In Proceedings of the 13th International Conference on Autonomous Agents and Multiagent Systems (AAMAS), pp. 1061-1068, Paris, France, 2014. ****best paper nomination****

Ron Artstein, David Traum, Oleg Alexander, Anton Leuski, Andrew Jones, Kallirroi Georgila, Paul Debevec, William Swartout, Heather Maio, and Stephen Smith. Time-Offset Interaction with a Holocaust Survivor. In Proceedings of the 19th International Conference on Intelligent User Interfaces, pp. 163-168, Haifa, Israel, 2014.

Kallirroi Georgila. Reinforcement Learning of Two-Issue Negotiation Dialogue Policies. In Proceedings of the 14th Annual SIGdial Meeting on Discourse and Dialogue, pp. 112-116, Metz, France, 2013.

David DeVault, Kallirroi Georgila, Ron Artstein, Fabrizio Morbini, David Traum, Stefan Scherer, Albert (Skip) Rizzo, and Louis-Philippe Morency. Verbal Indicators of Psychological Distress in Interactive Dialogue with a Virtual Human. In Proceedings of the 14th Annual SIGdial Meeting on Discourse and Dialogue, pp. 193-202, Metz, France, 2013. ****best paper nomination****

Elnaz Nouri, Kallirroi Georgila, and David Traum. A Cultural Decision-Making Model for Negotiation Based on Inverse Reinforcement Learning. In Proceedings of the 34th Annual Meeting of the Cognitive Science Society (CogSci), pp. 2097-2102, Sapporo, Japan, 2012.

Teruhisa Misu, Kallirroi Georgila, Anton Leuski, and David Traum. Reinforcement Learning of Question-Answering Dialogue Policies for Virtual Museum Guides. In Proceedings of the 13th Annual SIGdial Meeting on Discourse and Dialogue, pp. 84-93, Seoul, South Korea, 2012.

Kallirroi Georgila, Alan W. Black, Kenji Sagae, and David Traum. Practical Evaluation of Human and Synthesized Speech for Virtual Human Dialogue Systems. In Proceedings of the 8th International Conference on Language Resources and Evaluation (LREC), pp. 3519-3526, Istanbul, Turkey, 2012.

William Yang Wang and Kallirroi Georgila. Automatic Detection of Unnatural Word-Level Segments in Unit-Selection Speech Synthesis. In Proceedings of the IEEE Automatic Speech Recognition and Understanding Workshop (ASRU), pp. 289-294, Big Island, Hawaii, USA, 2011.

Kallirroi Georgila and David Traum. Reinforcement Learning of Argumentation Dialogue Policies in Negotiation. In Proceedings of the 12th Annual Conference of the International Speech Communication Association (INTERSPEECH), pp. 2073-2076, Florence, Italy, 2011.

Kallirroi Georgila and David Traum. Learning Culture-Specific Dialogue Models from Non-Culture Specific Data. In Proceedings of Universal Access in Human-Computer Interaction, HCI International, Orlando, Florida, USA. Lecture Notes in Computer Science, Vol. 6766, pp. 440-449, Springer Berlin Heidelberg, 2011.

Kallirroi Georgila, Ron Artstein, Angela Nazarian, Michael Rushforth, David Traum, and Katia Sycara. An Annotation Scheme for Cross-Cultural Argumentation and Persuasion Dialogues. In Proceedings of the 12th Annual SIGdial Meeting on Discourse and Dialogue, pp. 272-278, Portland, Oregon, USA, 2011.

Julia Campbell, Mark Core, Ron Artstein, Lindsay Armstrong, Arno Hartholt, Cyrus Wilson, Kallirroi Georgila, Fabrizio Morbini, Edward Haynes, Dave Gomboc, Mike Birch, Jonathan Bobrow, H. Chad Lane, Jillian Gerten, Anton Leuski, David Traum, Matthew Trimmer, Rich DiNinni, Matthew Bosack, Timothy Jones, Richard E. Clark, and Kenneth A. Yates. Developing INOTS to Support Interpersonal Skills Practice. In Proceedings of the IEEE Aerospace Conference, Big Sky, Montana, USA, 2011.

Antonio Roque, Kallirroi Georgila, Ron Artstein, Kenji Sagae, and David R. Traum. Natural Language Processing for Joint Fire Observer Training. In Proceedings of the 27th Army Science Conference, Orlando, Florida, USA, 2010.

Kallirroi Georgila, Ning Wang, and Jonathan Gratch. Cross-Domain Speech Disfluency Detection. In Proceedings of the 11th Annual SIGdial Meeting on Discourse and Dialogue, pp. 237-240, Tokyo, Japan, 2010.

Kallirroi Georgila, Maria K. Wolters, and Johanna D. Moore. Learning Dialogue Strategies from Older and Younger Simulated Users. In Proceedings of the 11th Annual SIGdial Meeting on Discourse and Dialogue, pp. 103-106, Tokyo, Japan, 2010.

Sebastian Andersson, Kallirroi Georgila, David Traum, Matthew Aylett, and Robert A. J. Clark. Prediction and Realisation of Conversational Characteristics by Utilising Spontaneous Speech for Unit Selection. In Proceedings of the 5th International Conference on Speech Prosody, Chicago, Illinois, USA, 2010.

Xuchen Yao, Pravin Bhutada, Kallirroi Georgila, Kenji Sagae, Ron Artstein, and David Traum. Practical Evaluation of Speech Recognizers for Virtual Human Dialogue Systems. In Proceedings of the 7th International Conference on Language Resources and Evaluation (LREC), pp. 1597-1602, Valletta, Malta, 2010.

Taghi Paksima, Kallirroi Georgila, and Johanna D. Moore. Evaluating the Effectiveness of Information Presentation in a Full End-to-End Dialogue System. In Proceedings of the 10th Annual SIGdial Meeting on Discourse and Dialogue, pp. 1-10, London, UK, 2009. ****best paper nomination****

Kallirroi Georgila. Using Integer Linear Programming for Detecting Speech Disfluencies. In Proceedings of the North American Chapter of the Association for Computational Linguistics - Human Language Technologies (NAACL-HLT), Short Papers, pp. 109-112, Boulder, Colorado, USA, 2009.

Ravichander Vipperla, Maria Wolters, Kallirroi Georgila, and Steve Renals. Speech Input from Older Users in Smart Environments: Challenges and Perspectives. In Proceedings of Universal Access in Human-Computer Interaction, HCI International, San Diego, California, USA. Lecture Notes in Computer Science, Vol. 5615, pp. 117-126, Springer Berlin Heidelberg, 2009.

Kallirroi Georgila, Maria Wolters, and Johanna D. Moore. Simulating the Behaviour of Older versus Younger Users when Interacting with Spoken Dialogue Systems. In Proceedings of the 46th Annual Meeting of the Association for Computational Linguistics: Human Language Technologies (ACL-HLT), pp. 49-52, Columbus, Ohio, USA, 2008.

Kallirroi Georgila, Maria Wolters, Vasilis Karaiskos, Melissa Kronenthal, Robert Logie, Neil Mayo, Johanna D. Moore, and Matt Watson. A Fully Annotated Corpus for Studying the Effect of Cognitive Ageing on Users' Interactions with Spoken Dialogue Systems. In Proceedings of the 6th International Conference on Language Resources and Evaluation (LREC), pp. 938-944, Marrakech, Morocco, 2008.

Oliver Lemon, Kallirroi Georgila, and James Henderson. Evaluating Effectiveness and Portability of Reinforcement Learned Dialogue Strategies with Real Users: The TALK TownInfo Evaluation. In Proceedings of the IEEE/ACL Workshop on Spoken Language Technology, pp. 178-181, Aruba, 2006.

Kallirroi Georgila, James Henderson, and Oliver Lemon. User Simulation for Spoken Dialogue Systems: Learning and Evaluation. In Proceedings of the 9th International Conference on Spoken Language Processing (INTERSPEECH-ICSLP), pp. 1065-1068, Pittsburgh, USA, 2006.

Kallirroi Georgila and Oliver Lemon. Programming by Voice: Enhancing Adaptivity and Robustness of Spoken Dialogue Systems. In Proceedings of the 10th Workshop on the Semantics and Pragmatics of Dialogue (SEMDIAL:BRANDIAL), Potsdam, Germany, 2006.

Oliver Lemon, Kallirroi Georgila, James Henderson, and Matthew Stuttle. An ISU Dialogue System Exhibiting Reinforcement Learning of Dialogue Policies: Generic Slot-Filling in the TALK In-Car System. In Proceedings of the 11th Conference of the European Chapter of the Association for Computational Linguistics (EACL), Demonstrations, pp. 119-122, Trento, Italy, 2006.

Kallirroi Georgila, James Henderson, and Oliver Lemon. Learning User Simulations for Information State Update Dialogue Systems. In Proceedings of the 9th European Conference on Speech Communication and Technology (INTERSPEECH-EUROSPEECH), pp. 893-896, Lisbon, Portugal, 2005.

Jost Schatzmann, Kallirroi Georgila, and Steve Young. Quantitative Evaluation of User Simulation Techniques for Spoken Dialogue Systems. In Proceedings of the 6th Annual SIGdial Meeting on Discourse and Dialogue, pp. 45-54, Lisbon, Portugal, 2005.

Kallirroi Georgila, Oliver Lemon, and James Henderson. Automatic Annotation of COMMUNICATOR Dialogue Data for Learning Dialogue Strategies and User Simulations. In Proceedings of the 9th Workshop on the Semantics and Pragmatics of Dialogue (SEMDIAL:DIALOR), pp. 61-68, Nancy, France, 2005.

James Henderson, Oliver Lemon, and Kallirroi Georgila. Hybrid Reinforcement/Supervised Learning for Dialogue Policies from COMMUNICATOR Data. In Proceedings of the IJCAI workshop on Knowledge and Reasoning in Practical Dialogue Systems, pp. 68-75, Edinburgh, UK, 2005.

James Henderson, Oliver Lemon, and Kallirroi Georgila. Hybrid Reinforcement/Supervised Learning of Dialogue Policies. Poster in the 2nd Joint Workshop on Multimodal Interaction and Related Machine Learning Algorithms, Edinburgh, UK, 2005.

Kallirroi Georgila and Oliver Lemon. Adaptive Multimodal Dialogue Management Based on the Information State Update approach. In Online Proceedings of W3C Workshop on Multimodal Interaction, Sophia-Antipolis, France, 2004.

Kallirroi Georgila, Nikos Fakotakis, and George Kokkinakis. A Graphical Tool for Handling Rule Grammars in Java Speech Grammar Format. In Proceedings of the 4th International Conference on Language Resources and Evaluation (LREC), pp. 615-618, Lisbon, Portugal, 2004.

Kallirroi Georgila, Kyriakos Sgarbas, Nikos Fakotakis, and George Kokkinakis. A Layered, Transducer-Based Language Model for Speech Recognition. In Proceedings of the 8th International Workshop on Speech and Computers, pp. 93-98, Moscow, Russia, 2003.

Ilyas Potamitis, Kallirroi Georgila, Nikos Fakotakis, and George Kokkinakis. Towards a User-friendly Automated Control of Home Appliances Based on Speech Recognition and Microphone Arrays. In Proceedings of the 8th International Workshop on Speech and Computers, pp. 226-230, Moscow, Russia, 2003.

Ilyas Potamitis, Kallirroi Georgila, Nikos Fakotakis, and George Kokkinakis. An Integrated System for Smart-Home Control of Appliances Based on Remote Speech Interaction. In Proceedings of the 8th European Conference on Speech Communication and Technology (EUROSPEECH), pp. 2197-2200, Geneva, Switzerland, 2003.

Ilyas Potamitis, Kallirroi Georgila, Panayiotis Zervas, Nikos Fakotakis, and George Kokkinakis. An Electronic Assistant for Automatic Control of Home-Appliances Using Natural Speech and Distant Microphones. In Proceedings of IASTED International Conference on Signal Processing, Pattern Recognition and Applications, pp. 191-195, Rhodes, Greece, 2003.

Kallirroi Georgila, Nikos Fakotakis, and George Kokkinakis. Efficient Stochastic Finite-State Networks for Language Modelling in Spoken Dialogue Systems. In Proceedings of the 7th European Conference on Speech Communication and Technology (EUROSPEECH), pp. 247-250, Aalborg, Denmark, 2001.

Kallirroi Georgila, Anastasios Tsopanoglou, Nikos Fakotakis, and George Kokkinakis. Refining the N-best Hypotheses List in Large Vocabulary Recognition by Applying Lexical Rules. In Proceedings of the 6th International Workshop on Speech and Computers, pp. 97- 102, Moscow, Russia, 2001.

Kallirroi Georgila, Nikos Fakotakis, and George Kokkinakis. Variable History Stochastic Networks for Language Modelling in Dialogue Systems. In Proceedings of the 6th International Workshop on Speech and Computers, pp. 182-187, Moscow, Russia, 2001.

Kallirroi Georgila, Anastasios Tsopanoglou, Nikos Fakotakis, and George Kokkinakis. Improved Large Vocabulary Speech Recognition Using Lexical Rules. In Proceedings of Advances in Human-Computer Interaction (PC-HCI) Conference, pp. 191-196, Patras, Greece, 2001.

Dimitrios Louloudis, Kallirroi Georgila, Anastasios Tsopanoglou, Nikos Fakotakis, and George Kokkinakis. Efficient Strategy and Language Modeling in Human-Machine Dialogues. In Proceedings of the 5th World Multi-Conference on Systemics, Cybernetics and Informatics (SCI), Vol. XIII, pp. 229-234, Orlando, Florida, USA, 2001.

Kallirroi Georgila, Nikos Fakotakis, and George Kokkinakis. Building Stochastic Language Model Networks Based on Simultaneous Word/Phrase Clustering. In Proceedings of the 6th International Conference on Spoken Language Processing (ICSLP), pp. 122-125, Beijing, China, 2000.

Kallirroi Georgila, Kyriakos Sgarbas, Nikos Fakotakis, and George Kokkinakis. Fast Very Large Vocabulary Recognition Based on Compact DAWG-Structured Language Models. In Proceedings of the 6th International Conference on Spoken Language Processing (ICSLP), pp. 987-990, Beijing, China, 2000.

Kallirroi Georgila, Nikos Fakotakis, and George Kokkinakis. A Graphical Parametric Language-Independent Tool for the Annotation of Speech Corpora. In Proceedings of the 2nd International Conference on Language Resources and Evaluation (LREC), pp. 1537- 1542, Athens, Greece, 2000.

Kallirroi Georgila, Anastasios Tsopanoglou, Nikos Fakotakis, and George Kokkinakis. An Integrated Dialogue System for the Automation of Call Centre Services. In Proceedings of the 5th International Conference on Spoken Language Processing (ICSLP), pp. 45-48, Sydney, Australia, 1998.

Kallirroi Georgila, Anastasios Tsopanoglou, Nikos Fakotakis, and George Kokkinakis. A Dialogue System for Telephone-Based Services Integrating Spoken and Written Language. In Proceedings of the 4th IEEE Workshop on Interactive Voice Technology for Telecommunications Applications (IVTTA), pp. 55-59, Turin, Italy, 1998.

Nikos Fakotakis, Kallirroi Georgila, and Anastasios Tsopanoglou. A Continuous HMM, Text Independent Speaker Recognition System Based on Vowel Spotting. In Proceedings of the 5th European Conference on Speech Communication and Technology (EUROSPEECH), Vol. 5, pp. 2347- 2350, Rhodes, Greece, 1997.