Proceedings of the 10th international ACM SIGACCESS conference on Computers and accessibility
Usable gestures for blind people: understanding preference and performance
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
1 thumb, 4 buttons, 20 words per minute: design and evaluation of H4-writer
Proceedings of the 24th annual ACM symposium on User interface software and technology
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
Input finger detection for nonvisual touch screen text entry in Perkinput
Proceedings of Graphics Interface 2012
Proceedings of the 15th international conference on Human-computer interaction with mobile devices and services
DigiTaps: eyes-free number entry on touchscreens with minimal audio feedback
Proceedings of the 26th annual ACM symposium on User interface software and technology
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A new non-visual method of numeric entry into a smartphone is designed, implemented, and tested. Users tap the smartphone screen with one to three fingers or swipe the screen in order to enter numbers. No buttons are used--only simple, easy-to-remember gestures. A preliminary valuation with sighted users compares the method to a standard accessible numeric keyboard with a VoiceOver-like screen reader interface for non-visual entry. We found that users entered numbers faster and with higher accuracy with our number entry method than with a VoiceOver-like interface, showing there is potential for use among blind people as well. The Tapulator, a complete calculator based on this non-visual numeric entry that uses simple gestures for arithmetic operations and other calculator actions is described.