From - Fri Feb 13 08:37:48 2004 X-Mozilla-Status: 0001 X-Mozilla-Status2: 00000000 Path: acsu.buffalo.edu!rapaport From: rapaport@cse.buffalo.edu (William J. Rapaport) Newsgroups: sunyab.cse.740 Subject: CogSci: Hastings on Latent Semantic Analysis Date: Thu, 12 Feb 2004 13:30:22 -0500 (EST) Organization: Computer Science and Engineering Lines: 65 Sender: Ncs@buffalo.edu Distribution: sunyab Message-ID: NNTP-Posting-Host: wasat.cse.buffalo.edu X-Trace: prometheus.acsu.buffalo.edu 1076610622 25734 128.205.32.15 (12 Feb 2004 18:30:22 GMT) X-Complaints-To: abuse@buffalo.edu NNTP-Posting-Date: Thu, 12 Feb 2004 18:30:22 +0000 (UTC) X-Newsreader: trn 4.0-test76 (Apr 2, 2001) Xref: acsu.buffalo.edu sunyab.cse.740:73 CENTER FOR COGNITIVE SCIENCE University at Buffalo, State University of New York Wednesday, February 18, 2004 2:00 pm - 4:00 pm 280 Park Hall, North Campus Peter Wiemer-Hastings, Ph.D. School of Computer Science, Telecommunication, and Information Systems, DePaul University "From Turing to Tutoring: Latent Semantic Analysis as Cognitive Model and Budget Natural Language Understanding" This talk will center on Latent Semantic Analysis (LSA), a vector-based technique for representing and comparing texts. Following a brief history of LSA and description of the process by which its representations are built, LSA will be discussed as a model for human language learning and representation. Despite the fact that it ignores syntax altogether, LSA has neared or matched human performance on a variety of tasks. For single-sentence texts, however, LSA does not perform well, presumably due (at least in part) to its ignorance of syntax. Research by Dennis et al, Kanejiya et al, and myself has explored augmenting LSA with various types of structural knowledge. This work parallels psychological studies on the effects of structure on similarity judgments. The talk will conclude with descriptions of applications of LSA as an expectation-based natural language understanding mechanism. A hardcopy of this announcement can be accessed here: http://www.cogsci.buffalo.edu/Activities/Colloquium/CLLQs04/hastingsannouncement.pdf Please print it out and post it in your department. Thank you! Center for Cognitive Science University at Buffalo, State University of New York 652 Baldy Hall, Buffalo, NY 14260 Phone: (716) 645-3794, Fax: (716) 645-3825 Email: ccs-cogsci-contact@buffalo.edu http://www.cogsci.buffalo.edu/Activities/Colloquium/CLLQs04/2004spring.htm All Center for Cognitive Science Events are sponsored by the Office of the Vice President for Research University at Buffalo State University of New York Center for Cognitive Science University at Buffalo 652 Baldy Hall Buffalo, NY 14260 P: (716) 645-2177 ext. 717 F: (716) 645-3825 Email: ccs-cogsci-contact@buffalo.edu URL: http://www.cogsci.buffalo.edu