Submitted Afra Alishahi and Suzanne Stevenson. Learning general properties of semantic roles from uasge data: a computational model. 2008 Afra Alishahi and Suzanne Stevenson (2008). A computational model for early argument structure acquisition. To appear in Cognitive Science, 32:5. Afra Alishahi, Afsaneh Fazly and Suzanne Stevenson. Fast mapping in word learning: What probabilities tell us. To appear in Proceedings of the 12th Conference on Computational Natural Language Learning, Manchester, UK, August 2008. [pdf] Afsaneh Fazly, Afra Alishahi and Suzanne Stevenson (2008). A probabilistic incremental model of word learning in the presence of referential uncertainty. To appear in Proceedings of the 30th Annual Conference of the Cognitive Science Society, Washington, D.C. (Cognitive Science 2008 Prize for the Best Paper on Language Modeling.) [pdf] Afra Alishahi (2008). A probabilistic model of early argument structure acquisition. PhD thesis, Department of Computer Science, University of Toronto. [pdf] 2007 Afra Alishahi and Suzanne Stevenson (2007). A cognitive model for the representation and acquisition of verb selectional preferences. In Proceedings of the ACL-2007 Workshop on Cognitive Aspects of Computational Language Acquisition , pages 41-48, Prague, Czech Republic. [pdf] Afra Alishahi and Suzanne Stevenson (2007). A computational usage-based model for learning general properties of semantic roles. In Proceedings of the 2nd European Cognitive Science Conference, Delphi, Greece. [pdf] 2005 Afra Alishahi and Suzanne Stevenson (2005). A probabilistic model of early argument structure acquisition. In Proceedings of the 27th Annual Conference of the Cognitive Science Society, pages 97-102, Stresa, Italy. (Marr Prize for Best Student Paper, Honorable Mention.) [pdf] Afra Alishahi and Suzanne Stevenson (2005). The acquisition and use of argument structure constructions: a Bayesian model. In Proceedings of the Second Workshop on Psycho-computational Models of Human Language Acquisition (ACL 2005), pages 82-90, Ann Arbor, Michigan, USA. [pdf] Old papers Afra Alishahi and Caro Lucas, "An Automatic Fuzzy Clustering Approach to Concept Retrieval and Classification of Unstructured Documents", accepted in JCIS98, North Carolina, USA, October 1998. Afra Alishahi and Caro Lucas, "A Hybrid Neural Network for Concept Clustering", Irano-Armenian Workshop on Neural Networks, September 1998. Afra Alishahi and Ramin Ghourchian, "Application of Non-deterministic Algorithms in Simulation of Food Finding of Ants", in 17th Seminar of Intelligent Systems, ISRF, November 1996.