Using handhelds to help people with motor impairments
Proceedings of the fifth international ACM conference on Assistive technologies
EdgeWrite: a stylus-based text entry method designed for high accuracy and stability of motion
Proceedings of the 16th annual ACM symposium on User interface software and technology
International Journal of Human-Computer Studies - Special issue: Fitts law 50 years later: Applications and contributions from human-computer interaction
Mobile text entry: relationship between walking speed and text input task difficulty
Proceedings of the 7th international conference on Human computer interaction with mobile devices & services
Target size study for one-handed thumb use on small touchscreen devices
Proceedings of the 8th conference on Human-computer interaction with mobile devices and services
How do people tap when walking? An empirical investigation of nomadic data entry
International Journal of Human-Computer Studies
Barrier pointing: using physical edges to assist target acquisition on mobile device touch screens
Proceedings of the 9th international ACM SIGACCESS conference on Computers and accessibility
ACM Transactions on Accessible Computing (TACCESS)
Evaluating one handed thumb tapping on mobile touchscreen devices
GI '08 Proceedings of graphics interface 2008
Getting off the treadmill: evaluating walking user interfaces for mobile devices in public spaces
Proceedings of the 10th international conference on Human computer interaction with mobile devices and services
Touch key design for target selection on a mobile phone
Proceedings of the 10th international conference on Human computer interaction with mobile devices and services
The performance of touch screen soft buttons
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
Assessing mobile touch interfaces for tetraplegics
Proceedings of the 12th international conference on Human computer interaction with mobile devices and services
Adaptive interfaces: a little learning is a dangerous thing...
UAHCI'11 Proceedings of the 6th international conference on Universal access in human-computer interaction: design for all and eInclusion - Volume Part I
Elderly user evaluation of mobile touchscreen interactions
INTERACT'11 Proceedings of the 13th IFIP TC 13 international conference on Human-computer interaction - Volume Part I
Proceedings of the 10th SIGPLAN symposium on New ideas, new paradigms, and reflections on programming and software
What we talk about: designing a context-aware communication tool for people with aphasia
Proceedings of the 14th international ACM SIGACCESS conference on Computers and accessibility
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
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Touch screen mobile devices bear the promise of endless leisure, communication, and productivity opportunities to motor-impaired people. Indeed, users with residual capacities in their upper extremities could benefit immensely from a device with no demands regarding strength. However, the precision required to effectively select a target without physical cues creates problems to people with limited motor abilities. Our goal is to thoroughly study mobile touch screen interfaces, their characteristics and parameterizations, thus providing the tools for informed interface design for motor-impaired users. We present an evaluation performed with 15 tetraplegic people that allowed us to understand the factors limiting user performance within a comprehensive set of interaction techniques (Tapping, Crossing, Exiting and Directional Gesturing) and parameterizations (Position, Size and Direction). Our results show that for each technique, accuracy and precision vary across different areas of the screen and directions, in a way that is directly dependent on target size. Overall, Tapping was both the preferred technique and among the most effective. This proves that it is possible to design inclusive unified interfaces for motor-impaired and able-bodied users once the correct parameterization or adaptability is assured.