Adapting verbal protocol methods to investigate speech systems use

This paper presents a method to gather data from user interactions with a speech system. This method is based on existing verbal protocol methods usually used in Cognitive Psychology. The main aim of this method is to elicit the users' expectations and interpretations that are formed when interacting with the system, and can impede the dialogue success when they are erroneous. This article also provides an illustration of the application of this method based on an actual study with a conversational speech system under realistic conditions of use.