Short paper presented at #eurovis2015 Cagliari, Sardinia, Italy. Abstract: Filtering data on a visualization can be a challenge when multiple people work on a shared visualization, for instance on an interactive tabletop. Visualizations can present data that satisfy the union of all user filters, or data lenses can provide individual views on parts of the data. To support per-user filters simultaneously across a shared visualization, we explore different glyph approaches that complement data points with per-user filter status information. Adding physical positions of users around the tabletop as an extra attribute to the glyph, we attempt to lower the cognitive load required to map filter statuses to corresponding participants. This work presents the design choices, briefly covers technical development, reports on the evaluation results and points out possibilities for future work.

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PoPI: Glyph Designs for
Collaborative Filtering on
Interactive Tabletops
Sven Charleer
Joris Klerkx
Erik Duval

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von Zadow, U., Daiber, F., Schöning, J., & Krüger, A. (2010, November). Globaldata: multi-user
interaction with geographic information systems on interactive surfaces. In ACM International
Conference on Interactive Tabletops and Surfaces (pp. 318-318). ACM.

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?
?
Tang, A., Tory, M., Po, B., Neumann, P., & Carpendale, S. (2006, April). Collaborative coupling over
tabletop displays. In Proceedings of the SIGCHI conference on Human Factors in computing
systems (pp. 1181-1190). ACM.

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Isenberg, P., & Fisher, D. (2009, June).
Collaborative Brushing and Linking for Co‐
located Visual Analytics of Document
Collections. In Computer Graphics Forum (Vol. 28,
No. 3, pp. 1031-1038). Blackwell Publishing Ltd.
McGrath, W., Bowman, B., McCallum, D.,
Hincapié-Ramos, J. D., Elmqvist, N., & Irani, P.
(2012, November). Branch-explore-merge:
facilitating real-time revision control in
collaborative visual exploration. In
Proceedings of the 2012 ACM international
conference on Interactive tabletops and
surfaces (pp. 235-244). ACM.

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Tang, A., Tory, M., Po, B., Neumann, P., & Carpendale, S.
(2006, April). Collaborative coupling over tabletop
displays. In Proceedings of the SIGCHI conference on
Human Factors in computing systems (pp. 1181-1190).
ACM.

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User position
independence
+

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User position
independence
+
-
Legend?
Join/Leave

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filter!

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filter!filter!

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B1/B3 B2 C1 C2
Position of
Participant Indicator

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Identify data points within the filter
results of specific people
C
BA

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Viewpoint independence
Principle of similarity
No legend
Join/Leave Tabletop
v2 > v1
+

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Viewpoint independence
Principle of similarity
No legend
Join/Leave Tabletop
v2 > v1
+
-
Nearby neighbours

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Seemed “Logical”
+

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Seemed “Logical”
+
-
Principle of similarity
Slow

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*Surtola, H. (2005, July). The effect of data-
relatedness in interactive glyphs. In
Information Visualisation, 2005. Proceedings.
Ninth International Conference on (pp. 869-876).
IEEE.

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*Surtola, H. (2005, July). The effect of data-
relatedness in interactive glyphs. In
Information Visualisation, 2005. Proceedings.
Ninth International Conference on (pp. 869-876).
IEEE.
Natural mapping*
Viewpoint independence
Principle of similarity
Fastest
v1 > v2
Perceived most useful
+

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1
2
Kinect
Tabletop

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Future work
• Dynamic setting
• Color
• More attributes
• Visualization
types
22

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Sven Charleer
@svencharleer
Joris Klerkx
Erik Duval
* augmenthuman.wordpress.com
* svencharleer.com