Interpretation of strokes in radial menus: The case of the KeyScretch text entry method

Costagliola, Gennaro; Fuccella, Vittorio; Capua, Michele Di

doi:10.1016/j.jvlc.2013.02.003

Cited by 12 publications

(6 citation statements)

References 38 publications

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“…Participants typically need to take part in multiple sessions within a certain period of time, which requires a lot of time and effort commitment. Because of this, many previous studies, such as Banovic et al (2013), Costagliola et al (2013), Han and Kim (2015), Lyons et al (2006), and Mackenzie and Felzer (2010), only involved 6 to 12 participants. In this study, we recruited 13 sighted participants (5 male, 8 female) from an East Coast university in the United States, and each participated in 20 individual experiment sessions.…”

Section: Participantsmentioning

confidence: 99%

ThumbStroke

Lai

Zhang

Wang³

et al. 2019

ACM Trans. Manage. Inf. Syst.

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The QWERTY keyboard on mobile devices usually requires users’ full visual attention and both hands, which is not always possible. We propose a thumb-stroke-based keyboard, ThumbStroke, to support both sight-free and one-handed text entry. Text entry via ThumbStroke completely relies on the directions of thumb strokes at any place on the screen of a mobile device. It does not require physical press on any specific keys, thus eliminating the need for visual attention and reducing errors due to tiny key size, fat thumbs, limited thumb reachability, and visual occlusion. We empirically evaluated ThumbStroke through a 20-session longitudinal controlled lab experiment. ThumbStroke shows advantages in typing accuracy and user perceptions in comparison to the Escape and QWERTY keyboards and results in faster typing speed than QWERTY in sight-free and one-handed text entry. This study provides novel research contributions to mobile HCI, advancing the design of soft keyboards for one-handed interaction with mobile devices and mobile accessibility.

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Section: Participantsmentioning

confidence: 99%

ThumbStroke

Lai

Zhang

Wang³

et al. 2019

ACM Trans. Manage. Inf. Syst.

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“…Usually, participants need to use a new keyboard for multiple sessions over a period of time [28], making it very difficult to have a large sample size. That is why many previous studies [16,[29][30][31][32][33][34] only included 6~12 participants. In this study, 13 participants (5 male, 8 female) at an east-coast university in the United States were recruited and participated in the evaluation.…”

Section: Participantsmentioning

confidence: 99%

A Thumb Stroke-Based Virtual Keyboard for Sight-Free Text Entry on Touch-Screen Mobile Phones

Lai¹,

Zhang²,

Wang³

et al. 2018

Proceedings of the 51st Hawaii International Conference on System Sciences

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The use of QWERTY on most of the current mobile devices for text entry usually requires users' full visual attention and both hands, which is not always possible due to situational or physical impairments of users. Prior research has shown that users prefer to hold and interact with a mobile device with a single hand when possible, which is challenging and poorly supported by current mobile devices. We propose a novel thumbstroke based keyboard called ThumbStroke, which can support both sight-free and one-handed text entry on touch-screen mobile devices. Selecting a character for text entry via ThumbStroke completely relies on the directions of thumb movements at anywhere on a device screen. We evaluated ThumbStroke through a longitudinal lab experiment including 20 sessions with 13 participants. ThumbStroke shows advantages in typing accuracy and user perceptions in comparison to Escape and QWERTY and results in faster typing speed than QWERTY for sight-free text entry.

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“…KnotSketch is partly based on ink recognition techniques, previously developed for other applications [6,13,14].…”

Section: Knotsketchmentioning

confidence: 99%

A toolkit for knot diagram sketching, encoding and re-generation

Costagliola

Rosa

Fish³

et al. 2016

International Conferences on Distributed Multimedia Systems

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Knots occur in many areas of science and art. The mathematical field of Knot Theory studies an idealised form of knots by viewing them as closed loops in 3-space. They can be formally studied via knot drawings which are well-behaved projections of the knot onto the 2-D plane. Equivalence of knots in 3-space (ambient isotopy) can be encapsulated via sequences of diagram rewriting rules, called Reidemeister moves, but finding such sequences demonstrating isotopy of two knots can be immensely challenging. Whilst there are some sophisticated tools available for some knot theoretic tasks, there is limited (free) tool support for certain knot creation and interaction tasks, which could be useful for lecturers and students within University courses. We present KnotSketch, a tool with multiple functionalities including the ability to: (i) read off a form of Gauss code for a user sketched diagram; (ii) generate a diagram from such a code; (iii) regenerate a knot diagram via a different projection, thereby producing examples of equivalent knot diagrams that may look very different; (iv) interaction capabilities to quickly alter the knot via crossing changes and smooth the curves of the sketched diagram; (v) export facilities to generate svg images of the constructed knots. We evaluate KnotSketch via a case study demonstrating examples of intended usage within an educational setting. Furthermore, we performing a preliminary user study to evaluate the general usability of the tool.

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Interpretation of strokes in radial menus: The case of the KeyScretch text entry method

Cited by 12 publications

References 38 publications

ThumbStroke

ThumbStroke

A Thumb Stroke-Based Virtual Keyboard for Sight-Free Text Entry on Touch-Screen Mobile Phones

A toolkit for knot diagram sketching, encoding and re-generation

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