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Explorative studies on multimodal interaction in a PDA- and desktop-based scenario

This paper presents two explorative case studies on multimodal interaction. Goal of this work is to find and underpin design recommendations to provide well proven decision support across all phases of the usability engineering lifecycle [1]. During this work, user interface patterns for multimodal interaction were identified [2, 3]. These patterns are closely related to other user interface patterns [4, 5, 6]. Two empirical case studies, one using a Wizard of Oz setting and another one using a stand-alone prototype linked to a speech recognition engine [7] were conducted to assess the acceptance of resulting interaction styles. Although the prototypes applied as well those interface patterns that increase usability by means of traditional interaction techniques and thus compete with multimodal interaction styles, multimodal interaction was preferred by most of the users.