No abstract
Displays are growing in size, and are increasingly deployed in semi-public and public areas. When people use these public displays to pursue personal work, they expose their activities and sensitive data to passers-by. In most cases, such shoulder-surfing by others is likely voyeuristic vs. a deliberate attempt to steal information. Even so, safeguards are needed. Our goal is to mitigate shoulder-surfing problems in such settings. Our method leverages notions of territoriality and proxemics, where we sense and take action based on the spatial relationships between the passerby, the user of the display, and the display itself. First, we provide participants with awareness of shoulder-surfing moments, which in turn helps both parties regulate their behaviours and mediate further social interactions. Second, we provide methods that protect information when shoulder-surfing is detected. Here, users can move or hide information through easy to perform explicit actions. Alternately, the system itself can mask information from the passerby's view when it detects shoulder-surfing moments.
Designing interfaces or applications that move beyond the bounds of a single device screen enables new ways to engage with digital content. Research addressing the opportunities and challenges of interactions with multiple devices in concert is of continued focus in HCI research. To inform the future research agenda of this field, we contribute an analysis and taxonomy of a corpus of 510 papers in the crossdevice computing domain. For both new and experienced researchers in the field we provide: an overview, historic trends and unified terminology of cross-device research; discussion of major and under-explored application areas; mapping of enabling technologies; synthesis of key interaction techniques spanning across multiple devices; and review of common evaluation strategies. We close with a discussion of open issues. Our taxonomy aims to create a unified terminology and common understanding for researchers in order to facilitate and stimulate future cross-device research.
The availability of mobile device ecologies enables new types of ad-hoc co-located decision-making and sensemaking practices in which people find, collect, discuss, and share information. However, little is known about what kind of device configurations are suitable for these types of tasks. This paper contributes new insights into how people use configurations of devices for one representative example task: collaborative co-located trip-planning. We present an empirical study that explores and compares three strategies to use multiple devices: no-overview, overview on own device, and a separate overview device. The results show that the overview facilitated decision-and sensemaking during a collaborative trip-planning task by aiding groups to iterate their itinerary, organize locations and timings efficiently, and discover new insights. Groups shared and discussed more opinions, resulting in more democratic decision-making. Groups provided with a separate overview device engaged more frequently and spent more time in closely-coupled collaboration.
No abstract
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