||Activity-based Interaction Models for Next Generation Mobile Devices : Aktivitetscentrerede interaktionsmodeller til næste generation af mobile enheder
||Kloster Andreassen, Niels
||Larsen, Jakob Eg (CICT, Department of Informatics and Mathematical Modeling, Technical University of Denmark, DTU, DK-2800 Kgs. Lyngby, Denmark)
||Technical University of Denmark, DTU, DK-2800 Kgs. Lyngby, Denmark
||While recent generations of mobile devices have seen a dramatic increase in functionality, the basic interaction structure on mobile devices has been largely unchanged. As the functionality and information representations are becoming more extensive and complex, it will be required for designers of mobile devices to rethink the way users are interacting with mobile devices in order to preserve usability. In this thesis, we will consider how the current inadequate interaction structure of mobile devices can be changed to support the requirements for future generations of mobile devices. The thesis explores this consideration by focusing on three questions:
How can the current complex and diverse application paradigm be replaced with a scheme that allows users to express intent in a simple and unified fashion?
How can a mobile device support the personal information management needed in everyday use?
How can the mobile system adapt to and reflect its surroundings while retaining usefulness and effectiveness?
In order to address these questions, we present an interaction model called the Activity Domains model. The model is an adaptation for mobile devices of the NEXUS model described in (Larsen, 2005) with special focus on supporting user activities. We use the model to propose a framework design called Astroid, which forms the architectural basis for the development of two prototypes that represents the user interface of a mobile device. We have carried out usability tests of the prototypes using six test participants. Each of the participants was given a set of tasks and was observed while trying to solve them using the prototypes. The tests were performed within a short timeframe and they did not consider the long-term effectiveness of the prototypes. We find that it would be interesting to observe the usage of these systems in tests of longer durations, but leave that for further studies.
The usability tests and prototypes have shown that it is possible to make a system that works without the classical division between applications. The tests also have indicated that the attribute-based information management employed by the Activity Domains model is an approach that appeals to a wide range of users. The details of how to provide adaptiveness that is more effective are subject for further studies. Nevertheless, the test results suggest that the employment of user-centered artifacts combined with mobile sensory data is promising.
Creation date: 2008-08-21
Update date: 2008-08-21