Enhancing Older Adults' Gesture Typing Experience Using the T9 Keyboard on Small Touchscreen Devices
Emily Kuang, Ruihuan Chen, Mingming Fan
CHI 2023: The ACM CHI Conference on Human Factors in Computing Systems
Session: Accessible Interaction Techniques A
Older adults increasingly adopt small-screen devices, but limited motor dexterity hinders their ability to type effectively. While a 9-key (T9) keyboard allocates larger space to each key, it is shared by multiple consecutive letters. Consequently, users must interrupt their gestures when typing consecutive letters, leading to inefficiencies and poor user experience. Thus, we proposed a novel keyboard that leverages the currently unused key 1 to duplicate letters from the previous key, allowing the entry of consecutive letters without interruptions. A user study with 12 older adults showed that it significantly outperformed the T9 with wiggle gesture in typing speed, KSPC, insertion errors, and deletes per word while achieving comparable performance as the conventional T9. Repeating the typing tasks with 12 young adults found that the advantages of the novel T9 were consistent or enhanced. We also provide error analysis and design considerations for improving gesture typing on T9 for older adults.
Web:: programs.sigchi.org/chi/2023/...
Pre-recorded presentation videos for Papers at CHI 2023
18 апр 2023
