An Evaluation of Input Controls for In-Car Interactions

Ng, A., Brewster, S. A. , Beruscha, F. and Krautter, W. (2017) An Evaluation of Input Controls for In-Car Interactions. In: CHI '17: CHI Conference on Human Factors in Computing Systems, Denver, CO, USA, 6-11 May 2017, pp. 2845-2852. ISBN 9781450346559 (doi: 10.1145/3025453.3025736)

134441.pdf - Accepted Version



The way drivers operate in-car systems is rapidly changing as traditional physical controls, such as buttons and dials, are being replaced by touchscreens and touch-sensing surfaces. This has the potential to increase driver distraction and error as controls may be harder to find and use. This paper presents an in-car, on the road driving study which examined three key types of input controls to investigate their effects: a physical dial, pressure-based input on a touch surface and touch input on a touchscreen. The physical dial and pressure-based input were also evaluated with and without haptic feedback. The study was conducted with users performing a list-based targeting task using the different controls while driving on public roads. Eye-gaze was recorded to measure distraction from the primary task of driving. The results showed that target accuracy was high across all input methods (greater than 94%). Pressure-based targeting was the slowest while directly tapping on the targets was the faster selection method. Pressure-based input also caused the largest number of glances towards to the touchscreen but the duration of each glance was shorter than directly touching the screen. Our study will enable designers to make more appropriate design choices for future in-car interactions.

Item Type:Conference Proceedings
Glasgow Author(s) Enlighten ID:Brewster, Professor Stephen and Ng, Dr Alexander
Authors: Ng, A., Brewster, S. A., Beruscha, F., and Krautter, W.
College/School:College of Science and Engineering > School of Computing Science
Copyright Holders:Copyright © 2017 ACM
Publisher Policy:Reproduced in accordance with the copyright policy of the publisher

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
670071HappinessStephen BrewsterEuropean Commission (EC)645145COM - COMPUTING SCIENCE