🚀 go-pugleaf

University of Colorado at Boulder
Department of Computer Science
ECOT 717 Engineering Center
Campus Box 430
Boulder, Colorado 80309-0430
(303) 492-7514, FAX: (303) 492-2844

CS COLLOQUIUM

System Errors and User Correction in Spoken Dialogue Systems
Julia Hirschberg
AT&T Labs -- Research

February 5, 2001
3:30 - 4:30 PM
Engineering Center Classroom 245

Refreshments will be served afterwards in ECOT 831

Understanding how people speak when they interact with spoken dialogue
systems is critical to improving the performance of those systems.  In this
talk, I will describe several experiments on data collected from subjects
using TOOT, a system for accessing train information by phone, showing a)
that user corrections of system errors differ from other user speech along
several prosodic dimensions; and b) that prosodic information, together
with other automatically available features, can be used to classify turns
as corrections with a high degree of accuracy.  I will discuss additional
characteristics of user correction behavior that should be useful in
designing future dialogue systems.  For example, understanding whether
speakers are more likely to repeat or rephrase their utterances, add new
information or shorten their input, and how system behavior influences
these choices, suggests new strategies for appropriate on-line
modifications to a dialogue system's interaction strategy or to the
recognition procedures it employs.  I will describe plans to incorporate
our findings into a dialogue system which will handle workshop information
requests for a workshop on prosody in speech recognition in 2001.

(This is joint work with Diane Litman (AT&T) and Marc Swerts (IPO).)

Host:  Jim Martin
------------------------------
http://www.cs.colorado.edu/department/events/colloquia/colloquia.html

Sign Language Interpreters Available Upon Request.  Please contact Jane
Obrecht, Department of 
Computer Science, Engineering  ECOT 722, 303-492-6101, at least five days
prior to the colloquium.


**************************************
Jane Obrecht
Assistant to the Chair
University of Colorado at Boulder
Computer Science Department
Campus Box 430
obrecht@cs.colorado.edu
(303) 492-6101, fax (303) 492-2844
**************************************
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