Talk · CHI Conference on Human Factors in Computing Systems · April 21, 2020
Senorita: A Chorded Keyboard for Sighted, Low Vision, and Blind Mobile Users
Gulnar Rakhmetulla, Ahmed Sabbir Arif
Abstract
Senorita is a novel two-thumb virtual chorded keyboard for mobile devices. It arranges the letters on eight keys in a single row by the bottom edge of the device based on letter frequencies and the anatomy of the thumbs. Unlike most chorded methods, it provides visual cues to perform the chording actions in sequence, instead of simultaneously, when the actions are unknown, facilitating "learning by doing". Its compact design leaves most of the screen available and its position near the edge accommodates eyes-free text entry. In a longitudinal study with a smartphone, Senorita yielded on average 14 wpm. In a short-term study with a tablet, it yielded on average 9.3 wpm. In the final longitudinal study, it yielded 3.7 wpm with blind users, surpassing their Qwerty performance. Low vision users yielded 5.8 wpm. Further, almost all users found Senorita effective, easy to learn, and wanted to keep use it.
More by Gulnar Rakhmetulla
- Predicting Text Selection Time and Effort on Smartphones from Selection CharacteristicsInternational Conference on PErvasive Technologies Related to Assistive Environments · 2025
- GeShort: One-Handed Mobile Text Editing and Formatting with Gestural Shortcuts and a Floating ClipboardProceedings of the ACM on Human-Computer Interaction · 2023 · Citations: 7
- Crownboard: A One-Finger Crown-Based Smartwatch Keyboard for Users with Limited DexterityCHI Conference on Human Factors in Computing Systems · 2023 · Citations: 12
- Enabling Input on Tiny/Headless Systems Using Morse CodearXiv · 2020 · Citations: 3