https://www.dagstuhl.de/19292

July 14 – 19 , 2019, Dagstuhl Seminar 19292

Mobile Data Visualization

Organizers

Eun Kyoung Choe (University of Maryland – College Park, US)
Raimund Dachselt (TU Dresden, DE)
Petra Isenberg (INRIA Saclay – Orsay, FR)
Bongshin Lee (Microsoft Research – Redmond, US)

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Documents

Dagstuhl Report, Volume 9, Issue 7 Dagstuhl Report
Aims & Scope
List of Participants
Shared Documents
DemoHour [JPG]
ResearchStorming [JPG]
mobilevis [png]
Group2-Reportback [JPG]
Critique [jpg]
Dagstuhl Seminar Wiki

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Summary

As pen- and/or touch-enabled mobile devices have become more powerful and ubiquitous, we see a growing demand for mobile data visualization to facilitate visual access to data on mobile devices (see Figure 1 for examples). Lay people increasingly access a wide range of data, including weather, finance, and personal health on their phone. Small business owners start to use business intelligence software equipped with data visualization on mobile devices to make better business decisions. In responding to these needs, practitioners have actively been designing mobile visualizations embedded in commercial systems. However, research communities, such as Human-Computer Interaction (HCI), Information Visualization (InfoVis), and Ubiquitous Computing (UbiComp) have not paid enough attention to mobile data visualization.

Over the past few decades, the visualization research community has conducted extensive research, designing and developing a large number of visualization techniques and systems mostly for a desktop environment. However, the accumulated knowledge may not be readily transferable to mobile devices due to their fundamental differences in their display size, interaction, and target audience, among others. The small display on mobile devices is more vulnerable to the scalability issue and poses a well-known challenge, the fat finger problem. Mouse-over interaction, which is prevalent in interactive visualization systems in the desktop environment, is not available on mobile devices. While traditional visualizations mainly target data-savvy groups of people such as scientists and researchers, visualizations on mobile devices should account for a broader range of target audience, including lay people who might have low data and visualization literacy.

This Dagstuhl seminar follows in the footsteps of the ``Data Visualization on Mobile Devices'' workshop at CHI 2018, our initial effort in establishing a community around mobile data visualization. We brought researchers and practitioners from relevant application and research fields, including InfoVis, UbiComp, mobile HCI, and interaction design to exchange information and experiences, to stimulate discussion, to make new connections, and to identify novel ideas and future directions around mobile data visualization.

Unlike the CHI workshop, this five-day Dagstuhl workshop enabled us to explore mobile data visualization in depth through speedy & intense research exchanges, interactive demos & tutorials, as well as active breakout group discussions.

The Week at a Glance

Monday. The seminar was kicked off by the organizers with an introduction to the topic of mobile data visualization and by providing organizational information. Afterwards, all participants introduced themselves and their expectations with a short two-minute slide presentation. This session was followed by a speedy research brainstorming activity (see Figure 2): In rapid five-minute sessions, two participants facing each other introduced their research activities and jointly sketched new ideas. By rotating half of the group, each session was repeated eleven times with new constellations of two people each time.

In the afternoon, five demo stations were set up and participants were split into groups to attend them in turn. Five researchers presented their latest mobile visualization demos in hands-on sessions (see Figure). These were:

  • Tanja Blascheck: Smartwatch demo from a study comparing three representations--bar, donut, text (joint work with Lonni Besançon, Anastasia Bezerianos, Bongshin Lee, Petra Isenberg).
  • Matthew Bremer: Tilting, brushing, & dialing for mobile vis (joint work with Bongshin Lee, Christopher Collins, Ken Hinckley).
  • Tobias Isenberg: Personal home automation system with mobile data access and control.
  • Alark Joshi: Visualization of off-screen data using summarization techniques (joint work with Martino Kuan, Alejandro Garcia, Sophie Engle).
  • Jo Vermeulen: Product Fingerprints, a mobile visualization that allows people to compare nutritional information between food products (joint work with Carrie Mah, Kevin Ta, Samuel Huron, Richard Pusch, Jo Vermeulen, Lora Oehlberg, Sheelagh Carpendale).

In a second activity, 14 participants presented a design critique of an existing mobile visualization, partly commercial products, partly research results (see Figure 4). Besides evoking the spirit of a good discussion, it helped getting a broad overview about currently available solutions.

In a followup activity, to arrive at a common understanding of the state of the art in mobile data visualization, we split attendees into three groups according to their main expertise. The three groups were:

  • Information Visualization--Mobile Visualization Resources
  • Visualization in Ubiquitous Computing Research
  • Mobile Interaction and Human Computer Interaction

Each group was tasked to collect and discuss the state of the art, with an end goal of creating a short presentation to be given to the entire audience. As a result, the collected material and insights were presented to the plenum by each group.

Through these diverse activities during the first day, participants did not only gain a good understanding of each other's background and research interests, but also established a common ground and expertise in the field of mobile data visualization

Tuesday. The second day started with a lively brainstorming and discussion of challenges and important research questions in the field of mobile data visualization. From about ten larger topics we identified, four were chosen to form parallel breakout groups:

  • Group 1: Evaluating Mobile Data Visualization
  • Group 2: What is Mobile Vis?
  • Group 3: Responsive Visualization
  • Group 4: Vis for Good & Ethics

Using the impressive facilities of Dagstuhl in terms of rooms and places, space to think and coffee to drink, we had intense discussions within each group. We generated deeper research questions and challenges, and identified collaborative cross-disciplinary research opportunities and approaches. Section 4 provides more details on each of these working groups.

After lunch, groups reported back on what they had discussed (see Figure 5). The four groups decided to continue and deepen their discussions in the afternoon, this time focusing more on what could become a concrete research output.

Wednesday. Wednesday morning was devoted to the presentation of tutorials. Five participants had volunteered to give tutorials in two time slots, allowing other participants to attend two one-hour tutorials. Figure 6 shows the title slides of all informative and well-received tutorials, and Section 3 provides details on each of them.

Following the tradition of Dagstuhl Seminar, Wednesday afternoon was set aside for social activities. We took the bus to experience the famous Saarschleife high from the impressive treetop walk. Visiting Mettlach and having dinner in a brewery intensified personal conversations and fostered planning for joint research collaborations.

Thursday. Similar to Tuesday, the entire day was dedicated to group work (see Figure 7). The list of possible topics for breakout groups was revisited, and people assembled to form new groups on other challenging topics:

  • Group 5: Starting Mobile Visualization from Scratch
  • Group 6: Beyond Watch & Phone: From Mobile to Ubiquitous Visualization
  • Group 7: (Discoverable) Interaction for Mobile Visualization
  • Group 8: From Perception to Behavior Change: Designing and Evaluating Glanceable Mobile Vis
  • Group 9: Mobile Vis for 3D Data / AR Vis

Again, both the morning and afternoon were used for intensely discussing challenges, defining design spaces, shaping the knowledge on the given topic, and identifying opportunities for joint research. Groups also reported back to the plenum, and results were discussed openly. Section 4 provides more details on each of these working groups and their outcomes.

Friday. After interesting and enriching days of joint discussions, which considerably broadened the horizon, time had come to wrap up the seminar on Mobile Data Visualization. Most importantly, a broad range of future collaborative activities were discussed: writing a state-of-the-art report, joint grant proposals, further workshop proposals, individual papers, editing a special journal issue, and writing a book on the topic. In the end, we agreed on a book as a possible major outcome (see Section 5). Organizational details were clarified, before the seminar was concluded with thanking all participants for their great contributions and commitment during the entire week.

Summary text license
  Creative Commons BY 3.0 Unported license
  Eun Kyoung Choe, Raimund Dachselt, Petra Isenberg, and Bongshin Lee

Classification

  • Mobile Computing
  • Society / Human-computer Interaction

Keywords

  • Mobile Computing
  • Data Visualization
  • Information Visualization
  • Ubiquitous Computing
  • Human-Computer Interaction

Documentation

In the series Dagstuhl Reports each Dagstuhl Seminar and Dagstuhl Perspectives Workshop is documented. The seminar organizers, in cooperation with the collector, prepare a report that includes contributions from the participants' talks together with a summary of the seminar.

 

Download overview leaflet (PDF).

Publications

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