The auditory AlphaWheel: a challenge to digit code representation of objects

Author(s): Karlberg, M., Wilkne, M.

Journal/Book: Behav Inform Technol. 1998; 17: One Gunpowder Square, London, England EC4A 3DE. Taylor & Francis Ltd. 93-102.

Abstract: Two public Swedish telephone voice response information services, using the traditional digit code paradigm for object representation, were implemented using the new auditory AlphaWheel paradigm. The paradigm is a software-implemented direct manipulation interface of the alphabet. Usability was tested experimentally, using the ETSI (European Telecommunications Standards Institute) usability model. Ten naive subjects participated in a test of each service, using both digit code and AlphaWheel paradigms. Some tasks required significantly longer completion time and more keystrokes using the new AlphaWheel paradigm. However, flexibility is high, since the new paradigm does not require access to any (code) manual. 70% of the users preferred the AlphaWheel application. Vocabularies limited to 400-500 objects are well suited for the paradigm, since in over 90% of the cases, only 1-2 of the initial letters of a name have to be elicited in order to generate a suitably constrained output set of objects.

Note: Article Goldstein M, Ericsson Radio Syst Ab, 23 Kista, SE-16980 Stockholm, SWEDEN

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