Smartphone Notifications in Context: a Case Study on Receptivity by the
Example of an Advertising Service
Late-Breaking Works: Interaction in Specific Domains
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Westermann, Tilo
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Wechsung, Ina
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Möller, Sebastian
Extended Abstracts of the ACM CHI'16 Conference on Human Factors in
Computing Systems
2016-05-07
v.2
p.2355-2361
© Copyright 2016 ACM
Summary: Notifications on smartphones are ubiquitous; they are providing a broad
range of information, from rather technical (e.g. app updates) to interpersonal
(e.g. a message from a friend). The disruptive nature poses the challenge of
finding opportune moments for delivery of notifications, and receptivity to
notifications depends on various factors that include perceived urgency and
time of delivery. This paper presents a case study with 126,000 participants
investigating the effect of the factor time on receptivity to notifications on
smartphones in the context of an advertising service. Results show significant
differences for weekdays and time of day regarding response times and number of
notification-triggered application launches. We conclude with a discussion on
the key findings and propose design implications for push notification
campaigns.
MoCCha: a mobile campus app for analyzing user behavior in the field
Posters
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Westermann, Tilo
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Möller, Sebastian
Proceedings of the 7th Nordic Conference on Human-Computer Interaction
2012-10-14
p.799-800
© Copyright 2012 ACM
Summary: In this paper, we present MoCCha, a mobile campus application used not only
as a subject of research, but as a research platform for a number of scientific
disciplines. Using apps that are available from mobile application stores
enables studying user behavior in the field with the aim for ecological
validity that human-subject studies in lab environments are potentially
missing.
CapWidgets: tangile widgets versus multi-touch controls on mobile devices
Works-in-progress
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Kratz, Sven
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Westermann, Tilo
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Rohs, Michael
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Essl, Georg
Proceedings of ACM CHI 2011 Conference on Human Factors in Computing Systems
2011-05-07
v.2
p.1351-1356
© Copyright 2011 ACM
Summary: We present CapWidgets, passive tangible controls for capacitive touch
screens. CapWidgets bring back physical controls to off-the-shelf multi-touch
surfaces as found in mobile phones and tablet computers. While the user touches
the widget, the surface detects the capacitive marker on the widget's
underside. We study the relative performance of this tangible interaction with
direct multi-touch interaction and our experimental results show that user
performance and preferences are not automatically in favor of tangible widgets
and careful design is necessary to validate their properties.
I'm home: Defining and evaluating a gesture set for smart-home control
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Kühnel, Christine
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Westermann, Tilo
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Hemmert, Fabian
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Kratz, Sven
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Müller, Alexander
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Möller, Sebastian
International Journal of Human-Computer Studies
2011
v.69
n.11
p.693-704
10.1016/j.ijhcs.2011.04.005
Keywords: Gesture-based interaction / Smart-home / User-centered design / Mobile
device
© Copyright 2011 Elsevier Ltd.
Summary: Mobile phones seem to present the perfect user interface for interacting
with smart environments, e.g. smart-home systems, as they are nowadays
ubiquitous and equipped with an increasing amount of sensors and interface
components, such as multi-touch screens. After giving an overview on related
work this paper presents the adapted design methodology proposed by Wobbrock et
al. (2009) for the development of a gesture-based user interface to a
smart-home system. The findings for the new domain, device and gesture space
are presented and compared to findings by Wobbrock et al. (2009). Three
additional steps are described: A small pre-test survey, a mapping and a memory
test and a performance test of the implemented system.
This paper shows the adaptability of the approach described by Wobbrock et
al. (2009) for three-dimensional gestures in the smart-home domain. Elicited
gestures are described and a first implementation of a user interface based on
these gestures is presented.
Evaluating multimodal systems: a comparison of established questionnaires
and interaction parameters
Full papers
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Kühnel, Christine
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Westermann, Tilo
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Weiss, Benjamin
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Möller, Sebastian
Proceedings of the Sixth Nordic Conference on Human-Computer Interaction
2010-10-16
p.286-294
Keywords: evaluation, gesture, multimodal interaction, smart-home
© Copyright 2010 ACM
Summary: This paper describes the analysis of established and new questionnaires
concerning their applicability for the assessment of quality aspects of
multimodal systems. To this purpose, an experiment with 27 participants
interacting with a smart-home system via a voice interface, a smartphone-based
interface and a multimodal interface, was conducted. Interaction parameters
were assessed and related to constructs measured with these questionnaires. The
results indicate that some of the questionnaires are suitable for evaluating
multimodal interfaces. On the basis of correlations with interaction parameters
subscales of these questionnaires can be mapped to quality aspects, such as
effectiveness and efficiency. Recommendations are given how to meet two
important evaluation requirements, namely which questionnaire to use for
comparing two or more systems or system versions and how to identify factors or
components in a system that have to be improved. This is another step forward
to establish evaluation methods for multimodal systems.
