From Inaction to Interaction: Concept and Application of the Null Gesture
alt.chi: See this, hear this, touch this, keep this
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Seipp, Karsten
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Verbert, Katrien
Extended Abstracts of the ACM CHI'16 Conference on Human Factors in
Computing Systems
2016-05-07
v.2
p.525-540
© Copyright 2016 ACM
Summary: Gestures in HCI often have a meaning in the real world or are specifically
designed for an application. They have a definition and purpose. We introduce
Null Gestures: Bodily utterances that have no clearly defined purpose or
meaning, such as rubbing one's chin while thinking. They exist, but their
assignment is 'Null'. Using the computer, we help users unlock their potential
by giving them a meaning in the human-computer dialogue. We thus hope to
instigate a discussion about their potential use in HCI and the role of the
computer as an enabler for the discovery of unused motor abilities.
One-Touch Pose Detection on Touchscreen Smartphones
Session 3: Fingers, Handprints and Dynamic Mirrors
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Seipp, Karsten
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Devlin, Kate
Proceedings of the 2015 ACM International Conference on Interactive
Tabletops and Surfaces
2015-11-15
p.51-54
© Copyright 2015 ACM
Summary: We present a technique that allows distinguishing between index finger and
thumb input on touchscreen phones, achieving an average accuracy of 82.6% in a
real-life application with only a single touch. We divide the screen into a
virtual grid of 9mmx9mm units and use a dedicated set of training data and
algorithms for classifying new touches in each screen location. Further, we
present correlations between physical and digital touch properties to extend
previous work.
BackPat: one-handed off-screen patting gestures
Devices and interaction design
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Seipp, Karsten
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Devlin, Kate
Proceedings of 2014 Conference on Human-Computer Interaction with Mobile
Devices and Services
2014-09-23
p.77-80
© Copyright 2014 ACM
Summary: We present BackPat -- a technique for supporting one-handed smartphone
operation by using pats of the index finger, middle finger or thumb on the back
or side of the device. We devise a novel method using the device's microphone
and gyroscope that enables finger-specific gesture detection and explore
efficiency and user acceptance of gesture execution for each finger in three
user studies with novice BackPat users.
BackPat: improving one-handed touchscreen operation by patting the back of
the device
Interactivity
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Seipp, Karsten
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Devlin, Kate
Proceedings of ACM CHI 2014 Conference on Human Factors in Computing Systems
2014-04-26
v.2
p.555-558
© Copyright 2014 ACM
Summary: We present BackPat: A technique for supporting one-handed smartphone
operation. Using pats of either the index finger or middle finger or thumb on
the back or side of the device, the user can extend one-handed use in a variety
of difficult tasks. We explain the principle behind the technique and make a
first attempt at examining its usability and versatility by implementing it
into four applications, covering text selection, reaching distant targets,
multiple file selection, and map and image zoom. An initial user study has
shown a high grade of acceptance, verified the interaction logic and
highlighted improvements in task-completion time over non-enhanced interaction.
This way we hope to encourage discussion about its usefulness and potential.
Landscape vs portrait mode: which is faster to use on your smart phone?
Posters
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Seipp, Karsten
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Devlin, Kate
Proceedings of 2013 Conference on Human-computer interaction with mobile
devices and services
2013-08-27
2013-08-27
p.534-539
© Copyright 2013 ACM
Summary: Touchscreen smart phones can be operated in portrait (P) and landscape (L)
orientation. However, whether a device is faster to operate in P or L and where
to put a button in each layout for best findability and operability remains
unclear. This research makes a first attempt to examine in which orientation a
touch-operated interface is faster to use and whether certain "zones" can be
identified that have a particularly good performance in either orientation. Our
results indicate that such zones exist in both L and P, and that L is faster to
use than P. However, the effects are only visible when the user has not been
primed with the target name. We conclude our study with practical advice for
designers to improve usability and efficiency of time-critical applications and
dialogues.
Enhancing one-handed website operation on touchscreen mobile phones
Interactivity: research
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Seipp, Karsten
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Devlin, Kate
Extended Abstracts of ACM CHI'13 Conference on Human Factors in Computing
Systems
2013-04-27
v.2
p.3123-3126
© Copyright 2013 ACM
Summary: Operating a website with one hand on a touchscreen mobile phone remains
difficult despite advances in hardware and software development. This problem
is exacerbated by manufacturers producing phones with larger screens which are
more difficult to hold and operate one-handedly. We present a way to enhance
one-handed operation of a website using standard client-side web technologies,
without the need to redesign the site or to overwrite any CSS styles. It
transforms input for form elements, media control and page access on the fly
into a thumb-friendly interaction model. Initial user testing of our interface
prototype confirms efficiency and learnability, and highlights its usefulness
for navigating long pages and finding the desired information more quickly,
even between different websites, when operating the device with one hand.
