Head tilting for interaction in mobile contexts

Authors:
Andrew Crossan;Mark McGill;Stephen Brewster;Roderick Murray-Smith
Affiliations:
University of Glasgow, Glasgow, UK;University of Glasgow, Glasgow, UK;University of Glasgow, Glasgow, UK;University of Glasgow, Glasgow, UK
Venue:
Proceedings of the 11th International Conference on Human-Computer Interaction with Mobile Devices and Services
Year:
2009

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Abstract

Developing interfaces for mobile situations requires that devices are useable on the move. Here, we explore head tilting as an input technique to allow a user to interact with a mobile device 'hands free'. A Fitts' Law style evaluation is described where a user acquires targets, moving the cursor by head tilt. We explore d position and velocity control cursor mechanisms in both static and mobile situations to see which provided the best level of performance. Results show that participants could successfully acquire targets using head tilting. Position control was shown to be si gnificantly faster and more accurate in a static context, but exhi bited significantly poorer accuracy and longer target acquisition times when the user was on the move. We further demonstrate how analysis of user's gait shows consistent targeting biases at different stages in the gait cycle.