EMU in the Car: Evaluating Multimodal Usability of a Satellite Navigation System

Authors:
Ann Blandford;Paul Curzon;Joanne Hyde;George Papatzanis
Affiliations:
UCL Interaction Centre, University College London, London, U.K WC1E 7DP;Queen Mary, University of London, U.K;formerly at Middlesex University U.K,;Queen Mary, University of London, U.K
Venue:
Interactive Systems. Design, Specification, and Verification
Year:
2008

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Abstract

The design and evaluation of multimodal systems has traditionally been a craft skill. There are some well established heuristics, guidelines and frameworks for assessing multimodal interactions, but no established methodologies that focus on the design of the interaction between user and system in context. In this paper, we present EMU, a systematic evaluation methodology for reasoning about the usability of an interactive system in terms of the modalities of interaction. We illustrate its application using an example of in-car navigation. EMU fills a niche in the repertoire of analytical evaluation approaches by focusing on the quality of interaction in terms of the modalities of interaction, how modalities are integrated, and where there may be interaction breakdowns due to modality clashes, synchronisation difficulties or distractions.