Characterizing In-Air Eyes-Free Typing Movements in VR
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- Characterizing In-Air Eyes-Free Typing Movements in VR
- Gil, Hyunjae; Shin, Yonghwan; Son, Hyungki; Hwang, Inwook; Oakley, Ian; Kim, Jin Ryong
- Issue Date
- Association for Computing Machinery
- ACM Symposium on Virtual Reality Software and Technology
- We empirically explore fundamental requirements for achieving VR in-air typing by observing the unconstrained eyes-free in-air typing of touch typists. We show that unconstrained typing movements differ substantively from previously observed constrained in-air typing movements and introduce a novel binary categorization of typing strategies: typists who use finger movements alone (FINGER) and those who combine finger movement with gross hand movement (HAND). We examine properties of finger kinematics, correlated movement of fingers, interrelation in consecutive key-strokes, and 3D distribution of key-stroke movements. We report that, compared to constrained typing, unconstrained typing generates shorter (49 mm) and faster (764 mm/s) key-strokes with a high correlation of finger movement and that the HAND strategy group exhibits more dynamic key-strokes. We discuss how these findings can inform the design of future in-air typing systems.
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