Designing the user interface of the computer-based speech training system ARTUR based on early user tests

Abstract

This study has been performed in order to evaluate a prototype for the human – computer interface of a computer-based speech training aid named ARTUR. The main feature of the aid is that it can give suggestions on how to improve articulations. Two user groups were involved: three children aged 9 – 14 with extensive experience of speech training with therapists and computers, and three children aged 6, with little or no prior experience of computer-based speech training. All children had general language disorders. The study indicates that the present interface is usable without prior training or instructions, even for the younger children, but that more motivational factors should be introduced. The granularity of the mesh that classifies mispronunciations was satisfactory, but the flexibility and level of detail of the feedback should be developed further.

Keywords:

• Computer-based speech training system
• User interface
• Wizard of Oz test
• Participatory design

Acknowledgements

The ARTUR project is funded by the Swedish Research Council, and this Wizard of Oz study was sponsored by the third Christian Benoît award given to the first author by the Christian Benoît Association. The Centre for Speech Technology is supported by VINNOVA (The Swedish Agency for Innovation Systems), KTH and participating Swedish companies and organizations. The authors would like to thank the speech therapists and children participating in the study, and Fredrik Winberg and David House for comments on earlier versions of the manuscript.