Verification of the Dialogue Model

that users immediately start to go beyond the limits of the system directed dialogue structure and utilizing the built-in shortcuts. An even more pronounced effect of user habituation can be expected when users are exposed to a larger number of dialogues.Speech recognition error rates for digit strings and word spotting were found to be 16% on average. This seemed sufficient to ensure user acceptance, but further stresses the importance of the dialogue design to ensure high user acceptance. The preceding sections have shown that the strategy of maintaining a system directed dialogue on the surface and then provide shortcuts for more experienced users has proved successful. The aim of Trial 2 was to investigate to what extent customers are prepared to accept voice controlled access to their bank accounts. The preliminary results strongly indicates that this is the case. The tested dialogue was very small, containing only a few sub tasks, so the next step will evidently be to expand the dialogue to cover a larger number of tasks, and a more complex task structure. Another very interesting experiment will be to subject users to a number of different dialogue models, in order to verify to what extent this influences their attitudes towards the system.