Effects of Prolonged Use on the Usability of a Multimodal Form-Filling Interface
Sturm, Janienke Cranen, Bert Terken, Jacques Bakx, Ilse
Text, Speech and Language Technology vol:28
Spoken Multimodal Human-Computer Dialogue in Mobile Environments pages:329-348
We present a study of the effect of prolonged use on the way users interact with a multimodal form-filling system. The system accepts spoken input as well as pointing input and provides output both in speech and in graphics. We measured the usability of the system in a pre-test / post-test design and analysed in detail the changes in interaction patterns due to exposure. The study shows that with practice users learn to develop interaction patterns that ensure reliable and efficient interaction, resulting in decreased dialogue duration and more user satisfaction.