Barrier pointing
- 15 October 2007
- conference paper
- Published by Association for Computing Machinery (ACM)
Abstract
Mobile phones and personal digital assistants (PDAs) are incredibly popular pervasive technologies. Many of these devices contain touch screens, which can present problems for users with motor impairments due to small targets and their reliance on tapping for target acquisition. In order to select a target, users must tap on the screen, an action which requires the precise motion of flying into a target and lifting without slipping. In this paper, we propose a new technique for target acquisition called barrier pointing, which leverages the elevated physical edges surrounding the screen to improve pointing accuracy. After designing a series of barrier pointing techniques, we conducted an initial study with 9 able bodied users and 9 users with motor impairments in order to discover the parameters that make barrier pointing successful. From this data, we offer an in-depth analysis of the performance of two motor impaired users for whom barrier pointing was especially beneficial. We show the importance of providing physical stability by allowing the stylus to press against the screen and its physical edge. We offer other design insights and lessons learned that can inform future attempts at leveraging the physical properties of mobile devices to improve accessibility.Keywords
This publication has 20 references indexed in Scilit:
- ShiftPublished by Association for Computing Machinery (ACM) ,2007
- Augmentative and Alternative Communication and Cell Phone Use: One Off-the-Shelf Solution and Some Policy ConsiderationsAssistive Technology, 2004
- The benefits of physical edges in gesture-makingPublished by Association for Computing Machinery (ACM) ,2003
- Accessible cell phone design: development and application of a needs analysis frameworkDisability and Rehabilitation, 2003
- WebThumbPublished by Association for Computing Machinery (ACM) ,2002
- More than dotting the i's --- foundations for crossing-based interfacesPublished by Association for Computing Machinery (ACM) ,2002
- Acquisition of expanding targetsPublished by Association for Computing Machinery (ACM) ,2002
- Acquisition Speed with Targets on the Edge of the Screen: An Application of Fitts' Law to Commonly Used Web Browser ControlsProceedings of the Human Factors and Ergonomics Society Annual Meeting, 2001
- Keyboard and mouse errors due to motor disabilitiesInternational Journal of Human-Computer Studies, 1999
- Predictors of Assistive Technology AbandonmentAssistive Technology, 1993