For over 10 years we have investigated nonvisual text input on touchscreens. We have characterized in dept users’ behaviors and contributed with novel interfaces and interaction techniques.
Text-Entry on Mobile Devices
Today’s mainstream touchscreen devices support non-visual text input via the built-in screen readers e.g. VoiceOver and Talkback. They enable users to explore the keyboard with their finger and have the keys read aloud as they touch them. While the visual layout of the QWERTY keyboard is identical to that presented to sighted users, input rates are much slower for visually impaired people.
We have conducted extensive research assessing text-entry performance on touchscreens, and explored multiple alternatives to the current default keyboard. In the research topic Braille IO you will find all our research bringing Braille to the forefront of the digital era. In this topic you will find other works that have relied on the exploration of multiple audio sources and other keyboard layouts and interactions.
The Design Space of Nonvisual Word Completion
Hugo Nicolau, André Rodrigues, André Santos, Tiago Guerreiro, Kyle Montague, João Guerreiro
In The 21st International ACM SIGACCESS Conference on Computers and Accessibility (ASSETS '19). ACM, New York, NY, USA, 249-261.
Investigating Laboratory and Everyday Typing Performance of Blind Users
Hugo Nicolau, Kyle Montague, Tiago Guerreiro, André Rodrigues Vicki L. Hanson
ACM Transactions on Accessible Computing (TACCESS) - Special Issue (Part 2) of Papers from ASSETS 2015
Effect of target size on non-visual text-entry
André Rodrigues, Hugo Nicolau, Kyle Montague, Luís Carriço, Tiago Guerreiro
'16 Proceedings of the 18th International Conference on Human-Computer Interaction with Mobile Devices and Services, Pages 47-52, Florence, Italy — September 06 - 09, 2016
Typing Performance of Blind Users: An Analysis of Touch Behaviors, Learning Effect, and In-Situ Usage
Hugo Nicolau, Kyle Montague, André Rodrigues, Tiago Guerreiro, Vicki Hanson
17th International ACM SIGACCESS Conference on Computers and Accessibility. Lisboa, Portugal, October, 2015
TabLets get physical: non-visual text entry on tablet devices
João Guerreiro, André Rodrigues, Kyle Montague, Tiago Guerreiro, Hugo Nicolau, Daniel Gonçalves
ACM Conference on Human Factors in Computing Systems, Seoul, South Korea, April, 2015
Blind People and Mobile Touch-based Text-Entry: Acknowledging the Need for Different Flavors
João Oliveira, Tiago Guerreiro, Hugo Nicolau, Daniel Gonçalves, Joaquim Jorge
In The 13th International ACM SIGACCESS Conference on Computers and Accessibility (ASSETS '11). ACM, New York, NY, USA, 179-186.
NavTap: a Long Term Study with Excluded Blind Users
Tiago Guerreiro, Hugo Nicolau, Joaquim Jorge, Daniel Gonçalves
In The 11st International ACM SIGACCESS Conference on Computers and Accessibility. Pittsburgh, USA, October, 2009.