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Modeling Gesture-Typing Movements.
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- Author(s): Quinn, Philip; Zhai, Shumin
- Source:
Human-Computer Interaction. 2018, Vol. 33 Issue 3, p234-280. 47p. - Source:
- Additional Information
- Subject Terms:
- Abstract: Word-Gesture keyboards allow users to enter text using continuous input strokes (also known as
gesture typing orshape writing ). We developed a production model of gesture typing input based on a human motor control theory of optimal control (specifically, modeling human drawing movements as aminimization of jerk —the third derivative of position). In contrast to existing models, which consider gestural input as a series of concatenated aiming movements and predict a user’s time performance, this descriptive theory of human motor control predicts the shapes and trajectories that users will draw. The theory is supported by an analysis of user-produced gestures that found qualitative and quantitative agreement between the shapes users drew and the minimum jerk theory of motor control. Furthermore, by using a small number of statisticalvia-points whose distributions reflect the sensorimotor noise and speed-accuracy trade-off in gesture typing, we developed a model of gesture production that can predict realistic gesture trajectories for arbitrary text input tasks. The model accurately reflects features in the figural shapes and dynamics observed from users and can be used to improve the design and evaluation of gestural input systems. [ABSTRACT FROM AUTHOR] - Abstract: Copyright of Human-Computer Interaction is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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