Interspeech'2005 - Eurospeech

Lisbon, Portugal
September 4-8, 2005

Development and Evaluation of a Spoken Dialog System to Access a Newspaper Web Site

César González-Ferreras, Valentín Cardeñoso-Payo

Universidad de Valladolid, Spain

This paper presents a system that provides access to a newspaper web site. The system is based on an interaction model, that uses browse and search strategies, and on an information model, which is made up of a tree and indexes. A frame-based approach is used to control the dialog flow. VoiceXML is used as a language to describe dialog turns. The systems works for Spanish language. To measure the usability of the system we evaluated the performance using objective measures and user satisfaction using SASSI questionnaire. The results of the evaluation show a task success rate of 92% and a WER of 18.09%. Overall user satisfaction is positive: users perceive the system as useful and easy to use. We conclude the paper with a discussion of the most relevant issues about the development and evaluation of the system.

Full Paper

Bibliographic reference.  González-Ferreras, César / Cardeñoso-Payo, Valentín (2005): "Development and evaluation of a spoken dialog system to access a newspaper web site", In INTERSPEECH-2005, 857-860.